X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fnand_base.c;h=ea6d2c334aed0ad005a4c474677115b1e815b1ae;hb=f1a28c02843efcfcc41982149880bac3ac180234;hp=4f387c8388d701f7f2290983432f3c0a07278979;hpb=cad74f2c380411ae7bee997f3ba18834cfe313a2;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 4f387c8..ea6d2c3 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -10,63 +10,21 @@ * http://www.linux-mtd.infradead.org/tech/nand.html * * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) - * 2002 Thomas Gleixner (tglx@linutronix.de) + * 2002-2006 Thomas Gleixner (tglx@linutronix.de) * - * 02-08-2004 tglx: support for strange chips, which cannot auto increment - * pages on read / read_oob - * - * 03-17-2004 tglx: Check ready before auto increment check. Simon Bayes - * pointed this out, as he marked an auto increment capable chip - * as NOAUTOINCR in the board driver. - * Make reads over block boundaries work too - * - * 04-14-2004 tglx: first working version for 2k page size chips - * - * 05-19-2004 tglx: Basic support for Renesas AG-AND chips - * - * 09-24-2004 tglx: add support for hardware controllers (e.g. ECC) shared - * among multiple independend devices. Suggestions and initial - * patch from Ben Dooks - * - * 12-05-2004 dmarlin: add workaround for Renesas AG-AND chips "disturb" - * issue. Basically, any block not rewritten may lose data when - * surrounding blocks are rewritten many times. JFFS2 ensures - * this doesn't happen for blocks it uses, but the Bad Block - * Table(s) may not be rewritten. To ensure they do not lose - * data, force them to be rewritten when some of the surrounding - * blocks are erased. Rather than tracking a specific nearby - * block (which could itself go bad), use a page address 'mask' to - * select several blocks in the same area, and rewrite the BBT - * when any of them are erased. - * - * 01-03-2005 dmarlin: added support for the device recovery command sequence - * for Renesas AG-AND chips. If there was a sudden loss of power - * during an erase operation, a "device recovery" operation must - * be performed when power is restored to ensure correct - * operation. - * - * 01-20-2005 dmarlin: added support for optional hardware specific callback - * routine to perform extra error status checks on erase and write - * failures. This required adding a wrapper function for - * nand_read_ecc. - * - * 08-20-2005 vwool: suspend/resume added - * - * Credits: + * Credits: * David Woodhouse for adding multichip support * * Aleph One Ltd. and Toby Churchill Ltd. for supporting the * rework for 2K page size chips * - * TODO: + * TODO: * Enable cached programming for 2k page size chips * Check, if mtd->ecctype should be set to MTD_ECC_HW * if we have HW ecc support. * The AG-AND chips have nice features for speed improvement, * which are not supported yet. Read / program 4 pages in one go. * - * $Id: nand_base.c,v 1.150 2005/09/15 13:58:48 vwool Exp $ - * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. @@ -94,75 +52,46 @@ #endif /* Define default oob placement schemes for large and small page devices */ -static struct nand_oobinfo nand_oob_8 = { - .useecc = MTD_NANDECC_AUTOPLACE, +static struct nand_ecclayout nand_oob_8 = { .eccbytes = 3, .eccpos = {0, 1, 2}, - .oobfree = {{3, 2}, {6, 2}} + .oobfree = { + {.offset = 3, + .length = 2}, + {.offset = 6, + .length = 2}} }; -static struct nand_oobinfo nand_oob_16 = { - .useecc = MTD_NANDECC_AUTOPLACE, +static struct nand_ecclayout nand_oob_16 = { .eccbytes = 6, .eccpos = {0, 1, 2, 3, 6, 7}, - .oobfree = {{8, 8}} + .oobfree = { + {.offset = 8, + . length = 8}} }; -static struct nand_oobinfo nand_oob_64 = { - .useecc = MTD_NANDECC_AUTOPLACE, +static struct nand_ecclayout nand_oob_64 = { .eccbytes = 24, .eccpos = { 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63}, - .oobfree = {{2, 38}} + .oobfree = { + {.offset = 2, + .length = 38}} }; -/* This is used for padding purposes in nand_write_oob */ -static uint8_t ffchars[] = { - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, - 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, -}; +static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, + int new_state); + +static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, + struct mtd_oob_ops *ops); /* - * NAND low-level MTD interface functions + * For devices which display every fart in the system on a seperate LED. Is + * compiled away when LED support is disabled. */ -static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len); -static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len); -static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len); - -static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, uint8_t *buf); -static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, uint8_t *buf); -static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, const uint8_t *buf); -static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, const uint8_t *buf); -static int nand_erase(struct mtd_info *mtd, struct erase_info *instr); -static void nand_sync(struct mtd_info *mtd); - -/* Some internal functions */ -static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, - int page, uint8_t * oob_buf, - struct nand_oobinfo *oobsel, int mode); -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE -static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, - int page, int numpages, uint8_t *oob_buf, - struct nand_oobinfo *oobsel, int chipnr, - int oobmode); -#else -#define nand_verify_pages(...) (0) -#endif - -static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, - int new_state); +DEFINE_LED_TRIGGER(nand_led_trigger); /** * nand_release_device - [GENERIC] release chip @@ -172,17 +101,17 @@ static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, */ static void nand_release_device(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; /* De-select the NAND device */ - this->select_chip(mtd, -1); + chip->select_chip(mtd, -1); /* Release the controller and the chip */ - spin_lock(&this->controller->lock); - this->controller->active = NULL; - this->state = FL_READY; - wake_up(&this->controller->wq); - spin_unlock(&this->controller->lock); + spin_lock(&chip->controller->lock); + chip->controller->active = NULL; + chip->state = FL_READY; + wake_up(&chip->controller->wq); + spin_unlock(&chip->controller->lock); } /** @@ -193,8 +122,8 @@ static void nand_release_device(struct mtd_info *mtd) */ static uint8_t nand_read_byte(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; - return readb(this->IO_ADDR_R); + struct nand_chip *chip = mtd->priv; + return readb(chip->IO_ADDR_R); } /** @@ -206,8 +135,8 @@ static uint8_t nand_read_byte(struct mtd_info *mtd) */ static uint8_t nand_read_byte16(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; - return (uint8_t) cpu_to_le16(readw(this->IO_ADDR_R)); + struct nand_chip *chip = mtd->priv; + return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R)); } /** @@ -219,8 +148,8 @@ static uint8_t nand_read_byte16(struct mtd_info *mtd) */ static u16 nand_read_word(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; - return readw(this->IO_ADDR_R); + struct nand_chip *chip = mtd->priv; + return readw(chip->IO_ADDR_R); } /** @@ -230,15 +159,15 @@ static u16 nand_read_word(struct mtd_info *mtd) * * Default select function for 1 chip devices. */ -static void nand_select_chip(struct mtd_info *mtd, int chip) +static void nand_select_chip(struct mtd_info *mtd, int chipnr) { - struct nand_chip *this = mtd->priv; - switch (chip) { + struct nand_chip *chip = mtd->priv; + + switch (chipnr) { case -1: - this->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); break; case 0: - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); break; default: @@ -257,10 +186,10 @@ static void nand_select_chip(struct mtd_info *mtd, int chip) static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; for (i = 0; i < len; i++) - writeb(buf[i], this->IO_ADDR_W); + writeb(buf[i], chip->IO_ADDR_W); } /** @@ -274,10 +203,10 @@ static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; for (i = 0; i < len; i++) - buf[i] = readb(this->IO_ADDR_R); + buf[i] = readb(chip->IO_ADDR_R); } /** @@ -291,12 +220,11 @@ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; for (i = 0; i < len; i++) - if (buf[i] != readb(this->IO_ADDR_R)) + if (buf[i] != readb(chip->IO_ADDR_R)) return -EFAULT; - return 0; } @@ -311,12 +239,12 @@ static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; u16 *p = (u16 *) buf; len >>= 1; for (i = 0; i < len; i++) - writew(p[i], this->IO_ADDR_W); + writew(p[i], chip->IO_ADDR_W); } @@ -331,12 +259,12 @@ static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; u16 *p = (u16 *) buf; len >>= 1; for (i = 0; i < len; i++) - p[i] = readw(this->IO_ADDR_R); + p[i] = readw(chip->IO_ADDR_R); } /** @@ -350,12 +278,12 @@ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) { int i; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; u16 *p = (u16 *) buf; len >>= 1; for (i = 0; i < len; i++) - if (p[i] != readw(this->IO_ADDR_R)) + if (p[i] != readw(chip->IO_ADDR_R)) return -EFAULT; return 0; @@ -372,40 +300,37 @@ static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) { int page, chipnr, res = 0; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; u16 bad; if (getchip) { - page = (int)(ofs >> this->page_shift); - chipnr = (int)(ofs >> this->chip_shift); + page = (int)(ofs >> chip->page_shift); + chipnr = (int)(ofs >> chip->chip_shift); - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_READING); + nand_get_device(chip, mtd, FL_READING); /* Select the NAND device */ - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, chipnr); } else page = (int)ofs; - if (this->options & NAND_BUSWIDTH_16) { - this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, - page & this->pagemask); - bad = cpu_to_le16(this->read_word(mtd)); - if (this->badblockpos & 0x1) + if (chip->options & NAND_BUSWIDTH_16) { + chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE, + page & chip->pagemask); + bad = cpu_to_le16(chip->read_word(mtd)); + if (chip->badblockpos & 0x1) bad >>= 8; if ((bad & 0xFF) != 0xff) res = 1; } else { - this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, - page & this->pagemask); - if (this->read_byte(mtd) != 0xff) + chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, + page & chip->pagemask); + if (chip->read_byte(mtd) != 0xff) res = 1; } - if (getchip) { - /* Deselect and wake up anyone waiting on the device */ + if (getchip) nand_release_device(mtd); - } return res; } @@ -420,23 +345,33 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) */ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; uint8_t buf[2] = { 0, 0 }; - size_t retlen; - int block; + int block, ret; /* Get block number */ - block = ((int)ofs) >> this->bbt_erase_shift; - if (this->bbt) - this->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); + block = ((int)ofs) >> chip->bbt_erase_shift; + if (chip->bbt) + chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); /* Do we have a flash based bad block table ? */ - if (this->options & NAND_USE_FLASH_BBT) - return nand_update_bbt(mtd, ofs); + if (chip->options & NAND_USE_FLASH_BBT) + ret = nand_update_bbt(mtd, ofs); + else { + /* We write two bytes, so we dont have to mess with 16 bit + * access + */ + ofs += mtd->oobsize; + chip->ops.len = 2; + chip->ops.datbuf = NULL; + chip->ops.oobbuf = buf; + chip->ops.ooboffs = chip->badblockpos & ~0x01; - /* We write two bytes, so we dont have to mess with 16 bit access */ - ofs += mtd->oobsize + (this->badblockpos & ~0x01); - return nand_write_oob(mtd, ofs, 2, &retlen, buf); + ret = nand_do_write_oob(mtd, ofs, &chip->ops); + } + if (!ret) + mtd->ecc_stats.badblocks++; + return ret; } /** @@ -448,10 +383,10 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) */ static int nand_check_wp(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; /* Check the WP bit */ - this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); - return (this->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; + chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); + return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; } /** @@ -467,30 +402,28 @@ static int nand_check_wp(struct mtd_info *mtd) static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; - if (!this->bbt) - return this->block_bad(mtd, ofs, getchip); + if (!chip->bbt) + return chip->block_bad(mtd, ofs, getchip); /* Return info from the table */ return nand_isbad_bbt(mtd, ofs, allowbbt); } -DEFINE_LED_TRIGGER(nand_led_trigger); - /* * Wait for the ready pin, after a command * The timeout is catched later. */ static void nand_wait_ready(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; unsigned long timeo = jiffies + 2; led_trigger_event(nand_led_trigger, LED_FULL); /* wait until command is processed or timeout occures */ do { - if (this->dev_ready(mtd)) + if (chip->dev_ready(mtd)) break; touch_softlockup_watchdog(); } while (time_before(jiffies, timeo)); @@ -510,7 +443,7 @@ static void nand_wait_ready(struct mtd_info *mtd) static void nand_command(struct mtd_info *mtd, unsigned int command, int column, int page_addr) { - register struct nand_chip *this = mtd->priv; + register struct nand_chip *chip = mtd->priv; int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; /* @@ -530,10 +463,10 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, column -= 256; readcmd = NAND_CMD_READ1; } - this->cmd_ctrl(mtd, readcmd, ctrl); + chip->cmd_ctrl(mtd, readcmd, ctrl); ctrl &= ~NAND_CTRL_CHANGE; } - this->cmd_ctrl(mtd, command, ctrl); + chip->cmd_ctrl(mtd, command, ctrl); /* * Address cycle, when necessary @@ -542,20 +475,20 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, /* Serially input address */ if (column != -1) { /* Adjust columns for 16 bit buswidth */ - if (this->options & NAND_BUSWIDTH_16) + if (chip->options & NAND_BUSWIDTH_16) column >>= 1; - this->cmd_ctrl(mtd, column, ctrl); + chip->cmd_ctrl(mtd, column, ctrl); ctrl &= ~NAND_CTRL_CHANGE; } if (page_addr != -1) { - this->cmd_ctrl(mtd, page_addr, ctrl); + chip->cmd_ctrl(mtd, page_addr, ctrl); ctrl &= ~NAND_CTRL_CHANGE; - this->cmd_ctrl(mtd, page_addr >> 8, ctrl); + chip->cmd_ctrl(mtd, page_addr >> 8, ctrl); /* One more address cycle for devices > 32MiB */ - if (this->chipsize > (32 << 20)) - this->cmd_ctrl(mtd, page_addr >> 16, ctrl); + if (chip->chipsize > (32 << 20)) + chip->cmd_ctrl(mtd, page_addr >> 16, ctrl); } - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); /* * program and erase have their own busy handlers @@ -568,17 +501,18 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, case NAND_CMD_ERASE2: case NAND_CMD_SEQIN: case NAND_CMD_STATUS: - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); return; case NAND_CMD_RESET: - if (this->dev_ready) + if (chip->dev_ready) break; - udelay(this->chip_delay); - this->cmd_ctrl(mtd, NAND_CMD_STATUS, + udelay(chip->chip_delay); + chip->cmd_ctrl(mtd, NAND_CMD_STATUS, NAND_CTRL_CLE | NAND_CTRL_CHANGE); - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); - while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; + chip->cmd_ctrl(mtd, + NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); + while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; return; /* This applies to read commands */ @@ -587,8 +521,8 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, * If we don't have access to the busy pin, we apply the given * command delay */ - if (!this->dev_ready) { - udelay(this->chip_delay); + if (!chip->dev_ready) { + udelay(chip->chip_delay); return; } } @@ -614,7 +548,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, static void nand_command_lp(struct mtd_info *mtd, unsigned int command, int column, int page_addr) { - register struct nand_chip *this = mtd->priv; + register struct nand_chip *chip = mtd->priv; /* Emulate NAND_CMD_READOOB */ if (command == NAND_CMD_READOOB) { @@ -623,7 +557,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, } /* Command latch cycle */ - this->cmd_ctrl(mtd, command & 0xff, + chip->cmd_ctrl(mtd, command & 0xff, NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); if (column != -1 || page_addr != -1) { @@ -632,23 +566,23 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, /* Serially input address */ if (column != -1) { /* Adjust columns for 16 bit buswidth */ - if (this->options & NAND_BUSWIDTH_16) + if (chip->options & NAND_BUSWIDTH_16) column >>= 1; - this->cmd_ctrl(mtd, column, ctrl); + chip->cmd_ctrl(mtd, column, ctrl); ctrl &= ~NAND_CTRL_CHANGE; - this->cmd_ctrl(mtd, column >> 8, ctrl); + chip->cmd_ctrl(mtd, column >> 8, ctrl); } if (page_addr != -1) { - this->cmd_ctrl(mtd, page_addr, ctrl); - this->cmd_ctrl(mtd, page_addr >> 8, + chip->cmd_ctrl(mtd, page_addr, ctrl); + chip->cmd_ctrl(mtd, page_addr >> 8, NAND_NCE | NAND_ALE); /* One more address cycle for devices > 128MiB */ - if (this->chipsize > (128 << 20)) - this->cmd_ctrl(mtd, page_addr >> 16, + if (chip->chipsize > (128 << 20)) + chip->cmd_ctrl(mtd, page_addr >> 16, NAND_NCE | NAND_ALE); } } - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); /* * program and erase have their own busy handlers @@ -673,21 +607,25 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, case NAND_CMD_STATUS_ERROR1: case NAND_CMD_STATUS_ERROR2: case NAND_CMD_STATUS_ERROR3: - udelay(this->chip_delay); + udelay(chip->chip_delay); return; case NAND_CMD_RESET: - if (this->dev_ready) + if (chip->dev_ready) break; - udelay(this->chip_delay); - this->cmd_ctrl(mtd, NAND_CMD_STATUS, NAND_NCE | NAND_CLE); - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); - while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ; + udelay(chip->chip_delay); + chip->cmd_ctrl(mtd, NAND_CMD_STATUS, + NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, + NAND_NCE | NAND_CTRL_CHANGE); + while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; return; case NAND_CMD_READ0: - this->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_NCE | NAND_CLE); - this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); + chip->cmd_ctrl(mtd, NAND_CMD_READSTART, + NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, + NAND_NCE | NAND_CTRL_CHANGE); /* This applies to read commands */ default: @@ -695,8 +633,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, * If we don't have access to the busy pin, we apply the given * command delay */ - if (!this->dev_ready) { - udelay(this->chip_delay); + if (!chip->dev_ready) { + udelay(chip->chip_delay); return; } } @@ -717,27 +655,27 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, * Get the device and lock it for exclusive access */ static int -nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) +nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) { - spinlock_t *lock = &this->controller->lock; - wait_queue_head_t *wq = &this->controller->wq; + spinlock_t *lock = &chip->controller->lock; + wait_queue_head_t *wq = &chip->controller->wq; DECLARE_WAITQUEUE(wait, current); retry: spin_lock(lock); /* Hardware controller shared among independend devices */ /* Hardware controller shared among independend devices */ - if (!this->controller->active) - this->controller->active = this; + if (!chip->controller->active) + chip->controller->active = chip; - if (this->controller->active == this && this->state == FL_READY) { - this->state = new_state; + if (chip->controller->active == chip && chip->state == FL_READY) { + chip->state = new_state; spin_unlock(lock); return 0; } if (new_state == FL_PM_SUSPENDED) { spin_unlock(lock); - return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; + return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; } set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(wq, &wait); @@ -758,7 +696,7 @@ nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) * general NAND and SmartMedia specs * */ -static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) +static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state) { unsigned long timeo = jiffies; @@ -775,491 +713,307 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) * any case on any machine. */ ndelay(100); - if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) - this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); + if ((state == FL_ERASING) && (chip->options & NAND_IS_AND)) + chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); else - this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); + chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); while (time_before(jiffies, timeo)) { /* Check, if we were interrupted */ - if (this->state != state) + if (chip->state != state) return 0; - if (this->dev_ready) { - if (this->dev_ready(mtd)) + if (chip->dev_ready) { + if (chip->dev_ready(mtd)) break; } else { - if (this->read_byte(mtd) & NAND_STATUS_READY) + if (chip->read_byte(mtd) & NAND_STATUS_READY) break; } cond_resched(); } led_trigger_event(nand_led_trigger, LED_OFF); - status = (int)this->read_byte(mtd); + status = (int)chip->read_byte(mtd); return status; } /** - * nand_write_page - [GENERIC] write one page - * @mtd: MTD device structure - * @this: NAND chip structure - * @page: startpage inside the chip, must be called with (page & this->pagemask) - * @oob_buf: out of band data buffer - * @oobsel: out of band selecttion structre - * @cached: 1 = enable cached programming if supported by chip - * - * Nand_page_program function is used for write and writev ! - * This function will always program a full page of data - * If you call it with a non page aligned buffer, you're lost :) - * - * Cached programming is not supported yet. + * nand_read_page_raw - [Intern] read raw page data without ecc + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data */ -static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, - uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached) +static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) { - int i, status; - uint8_t ecc_code[32]; - int eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; - int *oob_config = oobsel->eccpos; - int datidx = 0, eccidx = 0, eccsteps = this->ecc.steps; - int eccbytes = 0; - - /* FIXME: Enable cached programming */ - cached = 0; - - /* Send command to begin auto page programming */ - this->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); + chip->read_buf(mtd, buf, mtd->writesize); + chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); + return 0; +} - /* Write out complete page of data, take care of eccmode */ - switch (eccmode) { - /* No ecc, write all */ - case NAND_ECC_NONE: - printk(KERN_WARNING "Writing data without ECC to NAND-FLASH is not recommended\n"); - this->write_buf(mtd, this->data_poi, mtd->writesize); - break; +/** + * nand_read_page_swecc - {REPLACABLE] software ecc based page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + */ +static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *p = buf; + uint8_t *ecc_calc = chip->buffers.ecccalc; + uint8_t *ecc_code = chip->buffers.ecccode; + int *eccpos = chip->ecc.layout->eccpos; - /* Software ecc 3/256, write all */ - case NAND_ECC_SOFT: - for (; eccsteps; eccsteps--) { - this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); - for (i = 0; i < 3; i++, eccidx++) - oob_buf[oob_config[eccidx]] = ecc_code[i]; - datidx += this->ecc.size; - } - this->write_buf(mtd, this->data_poi, mtd->writesize); - break; - default: - eccbytes = this->ecc.bytes; - for (; eccsteps; eccsteps--) { - /* enable hardware ecc logic for write */ - this->ecc.hwctl(mtd, NAND_ECC_WRITE); - this->write_buf(mtd, &this->data_poi[datidx], this->ecc.size); - this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); - for (i = 0; i < eccbytes; i++, eccidx++) - oob_buf[oob_config[eccidx]] = ecc_code[i]; - /* If the hardware ecc provides syndromes then - * the ecc code must be written immidiately after - * the data bytes (words) */ - if (this->options & NAND_HWECC_SYNDROME) - this->write_buf(mtd, ecc_code, eccbytes); - datidx += this->ecc.size; - } - break; - } + nand_read_page_raw(mtd, chip, buf); - /* Write out OOB data */ - if (this->options & NAND_HWECC_SYNDROME) - this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); - else - this->write_buf(mtd, oob_buf, mtd->oobsize); + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) + chip->ecc.calculate(mtd, p, &ecc_calc[i]); - /* Send command to actually program the data */ - this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); + for (i = 0; i < chip->ecc.total; i++) + ecc_code[i] = chip->oob_poi[eccpos[i]]; - if (!cached) { - /* call wait ready function */ - status = this->waitfunc(mtd, this, FL_WRITING); + eccsteps = chip->ecc.steps; + p = buf; - /* See if operation failed and additional status checks are available */ - if ((status & NAND_STATUS_FAIL) && (this->errstat)) { - status = this->errstat(mtd, this, FL_WRITING, status, page); - } + for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + int stat; - /* See if device thinks it succeeded */ - if (status & NAND_STATUS_FAIL) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write, page 0x%08x, ", __FUNCTION__, page); - return -EIO; - } - } else { - /* FIXME: Implement cached programming ! */ - /* wait until cache is ready */ - // status = this->waitfunc (mtd, this, FL_CACHEDRPG); + stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); + if (stat == -1) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += stat; } return 0; } -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE /** - * nand_verify_pages - [GENERIC] verify the chip contents after a write - * @mtd: MTD device structure - * @this: NAND chip structure - * @page: startpage inside the chip, must be called with (page & this->pagemask) - * @numpages: number of pages to verify - * @oob_buf: out of band data buffer - * @oobsel: out of band selecttion structre - * @chipnr: number of the current chip - * @oobmode: 1 = full buffer verify, 0 = ecc only + * nand_read_page_hwecc - {REPLACABLE] hardware ecc based page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data * - * The NAND device assumes that it is always writing to a cleanly erased page. - * Hence, it performs its internal write verification only on bits that - * transitioned from 1 to 0. The device does NOT verify the whole page on a - * byte by byte basis. It is possible that the page was not completely erased - * or the page is becoming unusable due to wear. The read with ECC would catch - * the error later when the ECC page check fails, but we would rather catch - * it early in the page write stage. Better to write no data than invalid data. + * Not for syndrome calculating ecc controllers which need a special oob layout */ -static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, - uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) +static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) { - int i, j, datidx = 0, oobofs = 0, res = -EIO; - int eccsteps = this->eccsteps; - int hweccbytes; - uint8_t oobdata[64]; - - hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; - - /* Send command to read back the first page */ - this->cmdfunc(mtd, NAND_CMD_READ0, 0, page); - - for (;;) { - for (j = 0; j < eccsteps; j++) { - /* Loop through and verify the data */ - if (this->verify_buf(mtd, &this->data_poi[datidx], mtd->eccsize)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); - goto out; - } - datidx += mtd->eccsize; - /* Have we a hw generator layout ? */ - if (!hweccbytes) - continue; - if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); - goto out; - } - oobofs += hweccbytes; - } + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *p = buf; + uint8_t *ecc_calc = chip->buffers.ecccalc; + uint8_t *ecc_code = chip->buffers.ecccode; + int *eccpos = chip->ecc.layout->eccpos; + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + chip->ecc.hwctl(mtd, NAND_ECC_READ); + chip->read_buf(mtd, p, eccsize); + chip->ecc.calculate(mtd, p, &ecc_calc[i]); + } + chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); - /* check, if we must compare all data or if we just have to - * compare the ecc bytes - */ - if (oobmode) { - if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); - goto out; - } - } else { - /* Read always, else autoincrement fails */ - this->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps); - - if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) { - int ecccnt = oobsel->eccbytes; - - for (i = 0; i < ecccnt; i++) { - int idx = oobsel->eccpos[i]; - if (oobdata[idx] != oob_buf[oobofs + idx]) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Failed ECC write verify, page 0x%08x, %6i bytes were succesful\n", - __FUNCTION__, page, i); - goto out; - } - } - } - } - oobofs += mtd->oobsize - hweccbytes * eccsteps; - page++; - numpages--; - - /* Apply delay or wait for ready/busy pin - * Do this before the AUTOINCR check, so no problems - * arise if a chip which does auto increment - * is marked as NOAUTOINCR by the board driver. - * Do this also before returning, so the chip is - * ready for the next command. - */ - if (!this->dev_ready) - udelay(this->chip_delay); - else - nand_wait_ready(mtd); + for (i = 0; i < chip->ecc.total; i++) + ecc_code[i] = chip->oob_poi[eccpos[i]]; - /* All done, return happy */ - if (!numpages) - return 0; + eccsteps = chip->ecc.steps; + p = buf; + + for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + int stat; - /* Check, if the chip supports auto page increment */ - if (!NAND_CANAUTOINCR(this)) - this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); + stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); + if (stat == -1) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += stat; } - /* - * Terminate the read command. We come here in case of an error - * So we must issue a reset command. - */ - out: - this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); - return res; + return 0; } -#endif /** - * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc - * @mtd: MTD device structure - * @from: offset to read from - * @len: number of bytes to read - * @retlen: pointer to variable to store the number of read bytes - * @buf: the databuffer to put data + * nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data * - * This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL - * and flags = 0xff + * The hw generator calculates the error syndrome automatically. Therefor + * we need a special oob layout and handling. */ -static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) +static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) { - return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff); -} + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *p = buf; + uint8_t *oob = chip->oob_poi; -/** - * nand_do_read_ecc - [MTD Interface] Read data with ECC - * @mtd: MTD device structure - * @from: offset to read from - * @len: number of bytes to read - * @retlen: pointer to variable to store the number of read bytes - * @buf: the databuffer to put data - * @oob_buf: filesystem supplied oob data buffer (can be NULL) - * @oobsel: oob selection structure - * @flags: flag to indicate if nand_get_device/nand_release_device should be preformed - * and how many corrected error bits are acceptable: - * bits 0..7 - number of tolerable errors - * bit 8 - 0 == do not get/release chip, 1 == get/release chip - * - * NAND read with ECC - */ -int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int flags) -{ + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + int stat; - int i, j, col, realpage, page, end, ecc, chipnr, sndcmd = 1; - int read = 0, oob = 0, ecc_status = 0, ecc_failed = 0; - struct nand_chip *this = mtd->priv; - uint8_t *data_poi, *oob_data = oob_buf; - uint8_t ecc_calc[32]; - uint8_t ecc_code[32]; - int eccmode, eccsteps; - int *oob_config, datidx; - int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; - int eccbytes; - int compareecc = 1; - int oobreadlen; - - DEBUG(MTD_DEBUG_LEVEL3, "nand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); + chip->ecc.hwctl(mtd, NAND_ECC_READ); + chip->read_buf(mtd, p, eccsize); - /* Do not allow reads past end of device */ - if ((from + len) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: Attempt read beyond end of device\n"); - *retlen = 0; - return -EINVAL; - } + if (chip->ecc.prepad) { + chip->read_buf(mtd, oob, chip->ecc.prepad); + oob += chip->ecc.prepad; + } - /* Grab the lock and see if the device is available */ - if (flags & NAND_GET_DEVICE) - nand_get_device(this, mtd, FL_READING); + chip->ecc.hwctl(mtd, NAND_ECC_READSYN); + chip->read_buf(mtd, oob, eccbytes); + stat = chip->ecc.correct(mtd, p, oob, NULL); - /* Autoplace of oob data ? Use the default placement scheme */ - if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) - oobsel = this->autooob; + if (stat == -1) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += stat; - eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; - oob_config = oobsel->eccpos; + oob += eccbytes; - /* Select the NAND device */ - chipnr = (int)(from >> this->chip_shift); - this->select_chip(mtd, chipnr); + if (chip->ecc.postpad) { + chip->read_buf(mtd, oob, chip->ecc.postpad); + oob += chip->ecc.postpad; + } + } - /* First we calculate the starting page */ - realpage = (int)(from >> this->page_shift); - page = realpage & this->pagemask; + /* Calculate remaining oob bytes */ + i = oob - chip->oob_poi; + if (i) + chip->read_buf(mtd, oob, i); - /* Get raw starting column */ - col = from & (mtd->writesize - 1); + return 0; +} - end = mtd->writesize; - ecc = this->ecc.size; - eccbytes = this->ecc.bytes; +/** + * nand_transfer_oob - [Internal] Transfer oob to client buffer + * @chip: nand chip structure + * @ops: oob ops structure + */ +static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, + struct mtd_oob_ops *ops) +{ + size_t len = ops->ooblen; - if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) - compareecc = 0; + switch(ops->mode) { - oobreadlen = mtd->oobsize; - if (this->options & NAND_HWECC_SYNDROME) - oobreadlen -= oobsel->eccbytes; + case MTD_OOB_PLACE: + case MTD_OOB_RAW: + memcpy(oob, chip->oob_poi + ops->ooboffs, len); + return oob + len; - /* Loop until all data read */ - while (read < len) { + case MTD_OOB_AUTO: { + struct nand_oobfree *free = chip->ecc.layout->oobfree; + size_t bytes; - int aligned = (!col && (len - read) >= end); - /* - * If the read is not page aligned, we have to read into data buffer - * due to ecc, else we read into return buffer direct - */ - if (aligned) - data_poi = &buf[read]; - else - data_poi = this->data_buf; + for(; free->length && len; free++, len -= bytes) { + bytes = min(len, free->length); - /* Check, if we have this page in the buffer - * - * FIXME: Make it work when we must provide oob data too, - * check the usage of data_buf oob field - */ - if (realpage == this->pagebuf && !oob_buf) { - /* aligned read ? */ - if (aligned) - memcpy(data_poi, this->data_buf, end); - goto readdata; + memcpy(oob, chip->oob_poi + free->offset, bytes); + oob += bytes; } + return oob; + } + default: + BUG(); + } + return NULL; +} - /* Check, if we must send the read command */ - if (sndcmd) { - this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); - sndcmd = 0; - } +/** + * nand_do_read_ops - [Internal] Read data with ECC + * + * @mtd: MTD device structure + * @from: offset to read from + * + * Internal function. Called with chip held. + */ +static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, + struct mtd_oob_ops *ops) +{ + int chipnr, page, realpage, col, bytes, aligned; + struct nand_chip *chip = mtd->priv; + struct mtd_ecc_stats stats; + int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; + int sndcmd = 1; + int ret = 0; + uint32_t readlen = ops->len; + uint8_t *bufpoi, *oob, *buf; - /* get oob area, if we have no oob buffer from fs-driver */ - if (!oob_buf || oobsel->useecc == MTD_NANDECC_AUTOPLACE || - oobsel->useecc == MTD_NANDECC_AUTOPL_USR) - oob_data = &this->data_buf[end]; - - eccsteps = this->ecc.steps; - - switch (eccmode) { - case NAND_ECC_NONE:{ - /* No ECC, Read in a page */ - static unsigned long lastwhinge = 0; - if ((lastwhinge / HZ) != (jiffies / HZ)) { - printk(KERN_WARNING - "Reading data from NAND FLASH without ECC is not recommended\n"); - lastwhinge = jiffies; - } - this->read_buf(mtd, data_poi, end); - break; - } + stats = mtd->ecc_stats; - case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ - this->read_buf(mtd, data_poi, end); - for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc) - this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); - break; + chipnr = (int)(from >> chip->chip_shift); + chip->select_chip(mtd, chipnr); - default: - for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) { - this->ecc.hwctl(mtd, NAND_ECC_READ); - this->read_buf(mtd, &data_poi[datidx], ecc); - - /* HW ecc with syndrome calculation must read the - * syndrome from flash immidiately after the data */ - if (!compareecc) { - /* Some hw ecc generators need to know when the - * syndrome is read from flash */ - this->ecc.hwctl(mtd, NAND_ECC_READSYN); - this->read_buf(mtd, &oob_data[i], eccbytes); - /* We calc error correction directly, it checks the hw - * generator for an error, reads back the syndrome and - * does the error correction on the fly */ - ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]); - if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " - "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr); - ecc_failed++; - } - } else { - this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); - } - } - break; - } + realpage = (int)(from >> chip->page_shift); + page = realpage & chip->pagemask; - /* read oobdata */ - this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); + col = (int)(from & (mtd->writesize - 1)); + chip->oob_poi = chip->buffers.oobrbuf; - /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */ - if (!compareecc) - goto readoob; + buf = ops->datbuf; + oob = ops->oobbuf; - /* Pick the ECC bytes out of the oob data */ - for (j = 0; j < oobsel->eccbytes; j++) - ecc_code[j] = oob_data[oob_config[j]]; + while(1) { + bytes = min(mtd->writesize - col, readlen); + aligned = (bytes == mtd->writesize); - /* correct data, if necessary */ - for (i = 0, j = 0, datidx = 0; i < this->ecc.steps; i++, datidx += ecc) { - ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); + /* Is the current page in the buffer ? */ + if (realpage != chip->pagebuf || oob) { + bufpoi = aligned ? buf : chip->buffers.databuf; - /* Get next chunk of ecc bytes */ - j += eccbytes; + if (likely(sndcmd)) { + chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); + sndcmd = 0; + } - /* Check, if we have a fs supplied oob-buffer, - * This is the legacy mode. Used by YAFFS1 - * Should go away some day - */ - if (oob_buf && oobsel->useecc == MTD_NANDECC_PLACE) { - int *p = (int *)(&oob_data[mtd->oobsize]); - p[i] = ecc_status; + /* Now read the page into the buffer */ + ret = chip->ecc.read_page(mtd, chip, bufpoi); + if (ret < 0) + break; + + /* Transfer not aligned data */ + if (!aligned) { + chip->pagebuf = realpage; + memcpy(buf, chip->buffers.databuf + col, bytes); } - if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x\n", page); - ecc_failed++; + buf += bytes; + + if (unlikely(oob)) { + /* Raw mode does data:oob:data:oob */ + if (ops->mode != MTD_OOB_RAW) + oob = nand_transfer_oob(chip, oob, ops); + else + buf = nand_transfer_oob(chip, buf, ops); } - } - readoob: - /* check, if we have a fs supplied oob-buffer */ - if (oob_buf) { - /* without autoplace. Legacy mode used by YAFFS1 */ - switch (oobsel->useecc) { - case MTD_NANDECC_AUTOPLACE: - case MTD_NANDECC_AUTOPL_USR: - /* Walk through the autoplace chunks */ - for (i = 0; oobsel->oobfree[i][1]; i++) { - int from = oobsel->oobfree[i][0]; - int num = oobsel->oobfree[i][1]; - memcpy(&oob_buf[oob], &oob_data[from], num); - oob += num; - } - break; - case MTD_NANDECC_PLACE: - /* YAFFS1 legacy mode */ - oob_data += this->ecc.steps * sizeof(int); - default: - oob_data += mtd->oobsize; + if (!(chip->options & NAND_NO_READRDY)) { + /* + * Apply delay or wait for ready/busy pin. Do + * this before the AUTOINCR check, so no + * problems arise if a chip which does auto + * increment is marked as NOAUTOINCR by the + * board driver. + */ + if (!chip->dev_ready) + udelay(chip->chip_delay); + else + nand_wait_ready(mtd); } + } else { + memcpy(buf, chip->buffers.databuf + col, bytes); + buf += bytes; } - readdata: - /* Partial page read, transfer data into fs buffer */ - if (!aligned) { - for (j = col; j < end && read < len; j++) - buf[read++] = data_poi[j]; - this->pagebuf = realpage; - } else - read += mtd->writesize; - - /* Apply delay or wait for ready/busy pin - * Do this before the AUTOINCR check, so no problems - * arise if a chip which does auto increment - * is marked as NOAUTOINCR by the board driver. - */ - if (!this->dev_ready) - udelay(this->chip_delay); - else - nand_wait_ready(mtd); - if (read == len) + readlen -= bytes; + + if (!readlen) break; /* For subsequent reads align to page boundary. */ @@ -1267,540 +1021,670 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, /* Increment page address */ realpage++; - page = realpage & this->pagemask; + page = realpage & chip->pagemask; /* Check, if we cross a chip boundary */ if (!page) { chipnr++; - this->select_chip(mtd, -1); - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); } + /* Check, if the chip supports auto page increment * or if we have hit a block boundary. */ - if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) + if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) sndcmd = 1; } - /* Deselect and wake up anyone waiting on the device */ - if (flags & NAND_GET_DEVICE) - nand_release_device(mtd); + ops->retlen = ops->len - (size_t) readlen; - /* - * Return success, if no ECC failures, else -EBADMSG - * fs driver will take care of that, because - * retlen == desired len and result == -EBADMSG - */ - *retlen = read; - return ecc_failed ? -EBADMSG : 0; + if (ret) + return ret; + + if (mtd->ecc_stats.failed - stats.failed) + return -EBADMSG; + + return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; } /** - * nand_read_oob - [MTD Interface] NAND read out-of-band + * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc * @mtd: MTD device structure * @from: offset to read from * @len: number of bytes to read * @retlen: pointer to variable to store the number of read bytes * @buf: the databuffer to put data * + * Get hold of the chip and call nand_do_read + */ +static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, uint8_t *buf) +{ + struct nand_chip *chip = mtd->priv; + int ret; + + /* Do not allow reads past end of device */ + if ((from + len) > mtd->size) + return -EINVAL; + if (!len) + return 0; + + nand_get_device(chip, mtd, FL_READING); + + chip->ops.len = len; + chip->ops.datbuf = buf; + chip->ops.oobbuf = NULL; + + ret = nand_do_read_ops(mtd, from, &chip->ops); + + nand_release_device(mtd); + + *retlen = chip->ops.retlen; + return ret; +} + +/** + * nand_do_read_oob - [Intern] NAND read out-of-band + * @mtd: MTD device structure + * @from: offset to read from + * @ops: oob operations description structure + * * NAND read out-of-band data from the spare area */ -static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) +static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, + struct mtd_oob_ops *ops) { - int i, col, page, chipnr; - struct nand_chip *this = mtd->priv; - int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; + int col, 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; - DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); + DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", + (unsigned int)from, (int)len); + + chipnr = (int)(from >> chip->chip_shift); + chip->select_chip(mtd, chipnr); /* Shift to get page */ - page = (int)(from >> this->page_shift); - chipnr = (int)(from >> this->chip_shift); + realpage = (int)(from >> chip->page_shift); + page = realpage & chip->pagemask; - /* Mask to get column */ - col = from & (mtd->oobsize - 1); + if (ops->mode != MTD_OOB_AUTO) { + col = ops->ooboffs; + direct = 1; + } else { + col = 0; + direct = 0; + } - /* Initialize return length value */ - *retlen = 0; + while(1) { + bytes = direct ? ops->ooblen : mtd->oobsize; + bufpoi = direct ? buf : chip->buffers.oobrbuf; - /* Do not allow reads past end of device */ - if ((from + len) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: Attempt read beyond end of device\n"); - *retlen = 0; - return -EINVAL; - } + if (likely(sndcmd)) { + chip->cmdfunc(mtd, NAND_CMD_READOOB, col, page); + sndcmd = 0; + } - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_READING); + chip->read_buf(mtd, bufpoi, bytes); - /* Select the NAND device */ - this->select_chip(mtd, chipnr); + if (unlikely(!direct)) + buf = nand_transfer_oob(chip, buf, ops); + else + buf += ops->ooblen; - /* Send the read command */ - this->cmdfunc(mtd, NAND_CMD_READOOB, col, page & this->pagemask); - /* - * Read the data, if we read more than one page - * oob data, let the device transfer the data ! - */ - i = 0; - while (i < len) { - int thislen = mtd->oobsize - col; - thislen = min_t(int, thislen, len); - this->read_buf(mtd, &buf[i], thislen); - i += thislen; - - /* Read more ? */ - if (i < len) { - page++; - col = 0; - - /* Check, if we cross a chip boundary */ - if (!(page & this->pagemask)) { - chipnr++; - this->select_chip(mtd, -1); - this->select_chip(mtd, chipnr); - } + readlen -= ops->ooblen; + if (!readlen) + break; - /* Apply delay or wait for ready/busy pin - * Do this before the AUTOINCR check, so no problems - * arise if a chip which does auto increment - * is marked as NOAUTOINCR by the board driver. + if (!(chip->options & NAND_NO_READRDY)) { + /* + * Apply delay or wait for ready/busy pin. Do this + * before the AUTOINCR check, so no problems arise if a + * chip which does auto increment is marked as + * NOAUTOINCR by the board driver. */ - if (!this->dev_ready) - udelay(this->chip_delay); + if (!chip->dev_ready) + udelay(chip->chip_delay); else nand_wait_ready(mtd); + } - /* Check, if the chip supports auto page increment - * or if we have hit a block boundary. - */ - if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) { - /* For subsequent page reads set offset to 0 */ - this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask); - } + /* Increment page address */ + realpage++; + + page = realpage & chip->pagemask; + /* Check, if we cross a chip boundary */ + if (!page) { + chipnr++; + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); } - } - /* Deselect and wake up anyone waiting on the device */ - nand_release_device(mtd); + /* Check, if the chip supports auto page increment + * or if we have hit a block boundary. + */ + if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) + sndcmd = 1; + } - /* Return happy */ - *retlen = len; + ops->retlen = ops->len; return 0; } /** - * nand_read_raw - [GENERIC] Read raw data including oob into buffer + * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band * @mtd: MTD device structure - * @buf: temporary buffer * @from: offset to read from - * @len: number of bytes to read - * @ooblen: number of oob data bytes to read + * @ops: oob operation description structure * - * Read raw data including oob into buffer + * NAND read data and/or out-of-band data */ -int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen) +static int nand_read_oob(struct mtd_info *mtd, loff_t from, + struct mtd_oob_ops *ops) { - struct nand_chip *this = mtd->priv; - int page = (int)(from >> this->page_shift); - int chip = (int)(from >> this->chip_shift); - int sndcmd = 1; - int cnt = 0; - int pagesize = mtd->writesize + mtd->oobsize; - int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; + int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) = NULL; + struct nand_chip *chip = mtd->priv; + int ret = -ENOTSUPP; + + ops->retlen = 0; /* Do not allow reads past end of device */ - if ((from + len) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt read beyond end of device\n"); + if ((from + ops->len) > mtd->size) { + DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " + "Attempt read beyond end of device\n"); return -EINVAL; } - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_READING); + nand_get_device(chip, mtd, FL_READING); - this->select_chip(mtd, chip); + switch(ops->mode) { + case MTD_OOB_PLACE: + case MTD_OOB_AUTO: + break; - /* Add requested oob length */ - len += ooblen; + case MTD_OOB_RAW: + /* Replace the read_page algorithm temporary */ + read_page = chip->ecc.read_page; + chip->ecc.read_page = nand_read_page_raw; + break; - while (len) { - if (sndcmd) - this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask); - sndcmd = 0; + default: + goto out; + } - this->read_buf(mtd, &buf[cnt], pagesize); + if (!ops->datbuf) + ret = nand_do_read_oob(mtd, from, ops); + else + ret = nand_do_read_ops(mtd, from, ops); - len -= pagesize; - cnt += pagesize; - page++; + if (unlikely(ops->mode == MTD_OOB_RAW)) + chip->ecc.read_page = read_page; + out: + nand_release_device(mtd); + return ret; +} - if (!this->dev_ready) - udelay(this->chip_delay); - else - nand_wait_ready(mtd); - /* Check, if the chip supports auto page increment */ - if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) - sndcmd = 1; +/** + * nand_write_page_raw - [Intern] raw page write function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: data buffer + */ +static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf) +{ + chip->write_buf(mtd, buf, mtd->writesize); + chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); +} + +/** + * nand_write_page_swecc - {REPLACABLE] software ecc based page write function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: data buffer + */ +static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *ecc_calc = chip->buffers.ecccalc; + const uint8_t *p = buf; + int *eccpos = chip->ecc.layout->eccpos; + + /* Software ecc calculation */ + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) + chip->ecc.calculate(mtd, p, &ecc_calc[i]); + + for (i = 0; i < chip->ecc.total; i++) + chip->oob_poi[eccpos[i]] = ecc_calc[i]; + + nand_write_page_raw(mtd, chip, buf); +} + +/** + * nand_write_page_hwecc - {REPLACABLE] hardware ecc based page write function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: data buffer + */ +static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *ecc_calc = chip->buffers.ecccalc; + const uint8_t *p = buf; + int *eccpos = chip->ecc.layout->eccpos; + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + chip->ecc.hwctl(mtd, NAND_ECC_WRITE); + chip->write_buf(mtd, p, eccsize); + chip->ecc.calculate(mtd, p, &ecc_calc[i]); } - /* Deselect and wake up anyone waiting on the device */ - nand_release_device(mtd); - return 0; + for (i = 0; i < chip->ecc.total; i++) + chip->oob_poi[eccpos[i]] = ecc_calc[i]; + + chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); } /** - * nand_write_raw - [GENERIC] Write raw data including oob - * @mtd: MTD device structure - * @buf: source buffer - * @to: offset to write to - * @len: number of bytes to write - * @buf: source buffer - * @oob: oob buffer + * nand_write_page_syndrome - {REPLACABLE] hardware ecc syndrom based page write + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: data buffer * - * Write raw data including oob + * The hw generator calculates the error syndrome automatically. Therefor + * we need a special oob layout and handling. */ -int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, - uint8_t *buf, uint8_t *oob) +static void nand_write_page_syndrome(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf) { - struct nand_chip *this = mtd->priv; - int page = (int)(to >> this->page_shift); - int chip = (int)(to >> this->chip_shift); - int ret; + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + const uint8_t *p = buf; + uint8_t *oob = chip->oob_poi; - *retlen = 0; + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { - /* Do not allow writes past end of device */ - if ((to + len) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: Attempt write " - "beyond end of device\n"); - return -EINVAL; - } + chip->ecc.hwctl(mtd, NAND_ECC_WRITE); + chip->write_buf(mtd, p, eccsize); - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); + if (chip->ecc.prepad) { + chip->write_buf(mtd, oob, chip->ecc.prepad); + oob += chip->ecc.prepad; + } - this->select_chip(mtd, chip); - this->data_poi = buf; + chip->ecc.calculate(mtd, p, oob); + chip->write_buf(mtd, oob, eccbytes); + oob += eccbytes; - while (len != *retlen) { - ret = nand_write_page(mtd, this, page, oob, &mtd->oobinfo, 0); - if (ret) - return ret; - page++; - *retlen += mtd->writesize; - this->data_poi += mtd->writesize; - oob += mtd->oobsize; + if (chip->ecc.postpad) { + chip->write_buf(mtd, oob, chip->ecc.postpad); + oob += chip->ecc.postpad; + } } - /* Deselect and wake up anyone waiting on the device */ - nand_release_device(mtd); - return 0; + /* Calculate remaining oob bytes */ + i = oob - chip->oob_poi; + if (i) + chip->write_buf(mtd, oob, i); } -EXPORT_SYMBOL_GPL(nand_write_raw); /** - * nand_prepare_oobbuf - [GENERIC] Prepare the out of band buffer + * nand_write_page - [INTERNAL] write one page * @mtd: MTD device structure - * @fsbuf: buffer given by fs driver - * @oobsel: out of band selection structre - * @autoplace: 1 = place given buffer into the oob bytes - * @numpages: number of pages to prepare - * - * Return: - * 1. Filesystem buffer available and autoplacement is off, - * return filesystem buffer - * 2. No filesystem buffer or autoplace is off, return internal - * buffer - * 3. Filesystem buffer is given and autoplace selected - * put data from fs buffer into internal buffer and - * retrun internal buffer - * - * Note: The internal buffer is filled with 0xff. This must - * be done only once, when no autoplacement happens - * Autoplacement sets the buffer dirty flag, which - * forces the 0xff fill before using the buffer again. - * -*/ -static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel, - int autoplace, int numpages) + * @chip: NAND chip descriptor + * @buf: the data to write + * @page: page number to write + * @cached: cached programming + */ +static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf, int page, int cached) { - struct nand_chip *this = mtd->priv; - int i, len, ofs; + int status; - /* Zero copy fs supplied buffer */ - if (fsbuf && !autoplace) - return fsbuf; + chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); - /* Check, if the buffer must be filled with ff again */ - if (this->oobdirty) { - memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift)); - this->oobdirty = 0; + chip->ecc.write_page(mtd, chip, buf); + + /* + * Cached progamming disabled for now, Not sure if its worth the + * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s) + */ + cached = 0; + + if (!cached || !(chip->options & NAND_CACHEPRG)) { + + chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + status = chip->waitfunc(mtd, chip, FL_WRITING); + /* + * See if operation failed and additional status checks are + * available + */ + if ((status & NAND_STATUS_FAIL) && (chip->errstat)) + status = chip->errstat(mtd, chip, FL_WRITING, status, + page); + + if (status & NAND_STATUS_FAIL) + return -EIO; + } else { + chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); + status = chip->waitfunc(mtd, chip, FL_WRITING); } - /* If we have no autoplacement or no fs buffer use the internal one */ - if (!autoplace || !fsbuf) - return this->oob_buf; - - /* Walk through the pages and place the data */ - this->oobdirty = 1; - ofs = 0; - while (numpages--) { - for (i = 0, len = 0; len < mtd->oobavail; i++) { - int to = ofs + oobsel->oobfree[i][0]; - int num = oobsel->oobfree[i][1]; - memcpy(&this->oob_buf[to], fsbuf, num); - len += num; - fsbuf += num; +#ifdef CONFIG_MTD_NAND_VERIFY_WRITE + /* Send command to read back the data */ + chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); + + if (chip->verify_buf(mtd, buf, mtd->writesize)) + return -EIO; +#endif + return 0; +} + +/** + * nand_fill_oob - [Internal] Transfer client buffer to oob + * @chip: nand chip structure + * @oob: oob data buffer + * @ops: oob ops structure + */ +static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, + struct mtd_oob_ops *ops) +{ + size_t len = ops->ooblen; + + switch(ops->mode) { + + case MTD_OOB_PLACE: + case MTD_OOB_RAW: + memcpy(chip->oob_poi + ops->ooboffs, oob, len); + return oob + len; + + case MTD_OOB_AUTO: { + struct nand_oobfree *free = chip->ecc.layout->oobfree; + size_t bytes; + + for(; free->length && len; free++, len -= bytes) { + bytes = min(len, free->length); + memcpy(chip->oob_poi + free->offset, oob, bytes); + oob += bytes; } - ofs += mtd->oobavail; + return oob; } - return this->oob_buf; + default: + BUG(); + } + return NULL; } #define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0 /** - * nand_write - [MTD Interface] NAND write with ECC + * nand_do_write_ops - [Internal] NAND write with ECC * @mtd: MTD device structure * @to: offset to write to - * @len: number of bytes to write - * @retlen: pointer to variable to store the number of written bytes - * @buf: the data to write + * @ops: oob operations description structure * * NAND write with ECC */ -static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, - size_t *retlen, const uint8_t *buf) +static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, + struct mtd_oob_ops *ops) { - int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; - int autoplace = 0, numpages, totalpages; - struct nand_chip *this = mtd->priv; - uint8_t *oobbuf, *bufstart, *eccbuf = NULL; - int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); - struct nand_oobinfo *oobsel = &mtd->oobinfo; - - DEBUG(MTD_DEBUG_LEVEL3, "nand_write: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); - - /* Initialize retlen, in case of early exit */ - *retlen = 0; + int chipnr, realpage, page, blockmask; + struct nand_chip *chip = mtd->priv; + uint32_t writelen = ops->len; + uint8_t *oob = ops->oobbuf; + uint8_t *buf = ops->datbuf; + int bytes = mtd->writesize; + int ret; - /* Do not allow write past end of device */ - if ((to + len) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write: Attempt to write past end of page\n"); - return -EINVAL; - } + ops->retlen = 0; /* reject writes, which are not page aligned */ - if (NOTALIGNED(to) || NOTALIGNED(len)) { - printk(KERN_NOTICE "nand_write: Attempt to write not page aligned data\n"); + if (NOTALIGNED(to) || NOTALIGNED(ops->len)) { + printk(KERN_NOTICE "nand_write: " + "Attempt to write not page aligned data\n"); return -EINVAL; } - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); - - /* Calculate chipnr */ - chipnr = (int)(to >> this->chip_shift); - /* Select the NAND device */ - this->select_chip(mtd, chipnr); + if (!writelen) + return 0; /* Check, if it is write protected */ if (nand_check_wp(mtd)) - goto out; + return -EIO; - /* Autoplace of oob data ? Use the default placement scheme */ - if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { - oobsel = this->autooob; - autoplace = 1; - } - if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) - autoplace = 1; + chipnr = (int)(to >> chip->chip_shift); + chip->select_chip(mtd, chipnr); - /* Setup variables and oob buffer */ - totalpages = len >> this->page_shift; - page = (int)(to >> this->page_shift); - /* Invalidate the page cache, if we write to the cached page */ - if (page <= this->pagebuf && this->pagebuf < (page + totalpages)) - this->pagebuf = -1; - - /* Set it relative to chip */ - page &= this->pagemask; - startpage = page; - /* Calc number of pages we can write in one go */ - numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages); - oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); - bufstart = (uint8_t *) buf; - - /* Loop until all data is written */ - while (written < len) { - - this->data_poi = (uint8_t *) &buf[written]; - /* Write one page. If this is the last page to write - * or the last page in this block, then use the - * real pageprogram command, else select cached programming - * if supported by the chip. - */ - ret = nand_write_page(mtd, this, page, &oobbuf[oob], oobsel, (--numpages > 0)); - if (ret) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write: write_page failed %d\n", ret); - goto out; - } - /* Next oob page */ - oob += mtd->oobsize; - /* Update written bytes count */ - written += mtd->writesize; - if (written == len) - goto cmp; + realpage = (int)(to >> chip->page_shift); + page = realpage & chip->pagemask; + blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; - /* Increment page address */ - page++; + /* Invalidate the page cache, when we write to the cached page */ + if (to <= (chip->pagebuf << chip->page_shift) && + (chip->pagebuf << chip->page_shift) < (to + ops->len)) + chip->pagebuf = -1; - /* Have we hit a block boundary ? Then we have to verify and - * if verify is ok, we have to setup the oob buffer for - * the next pages. - */ - if (!(page & (ppblock - 1))) { - int ofs; - this->data_poi = bufstart; - ret = nand_verify_pages(mtd, this, startpage, page - startpage, - oobbuf, oobsel, chipnr, (eccbuf != NULL)); - if (ret) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret); - goto out; - } - *retlen = written; - - ofs = autoplace ? mtd->oobavail : mtd->oobsize; - if (eccbuf) - eccbuf += (page - startpage) * ofs; - totalpages -= page - startpage; - numpages = min(totalpages, ppblock); - page &= this->pagemask; - startpage = page; - oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); - oob = 0; - /* Check, if we cross a chip boundary */ - if (!page) { - chipnr++; - this->select_chip(mtd, -1); - this->select_chip(mtd, chipnr); - } + chip->oob_poi = chip->buffers.oobwbuf; + + while(1) { + int cached = writelen > bytes && page != blockmask; + + if (unlikely(oob)) + oob = nand_fill_oob(chip, oob, ops); + + ret = nand_write_page(mtd, chip, buf, page, cached); + if (ret) + break; + + writelen -= bytes; + if (!writelen) + break; + + buf += bytes; + realpage++; + + page = realpage & chip->pagemask; + /* Check, if we cross a chip boundary */ + if (!page) { + chipnr++; + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); } } - /* Verify the remaining pages */ - cmp: - this->data_poi = bufstart; - ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL)); - if (!ret) - *retlen = written; - else - DEBUG(MTD_DEBUG_LEVEL0, "nand_write: verify_pages failed %d\n", ret); - out: - /* Deselect and wake up anyone waiting on the device */ - nand_release_device(mtd); + if (unlikely(oob)) + memset(chip->oob_poi, 0xff, mtd->oobsize); + ops->retlen = ops->len - writelen; return ret; } /** - * nand_write_oob - [MTD Interface] NAND write out-of-band + * nand_write - [MTD Interface] NAND write with ECC * @mtd: MTD device structure * @to: offset to write to * @len: number of bytes to write * @retlen: pointer to variable to store the number of written bytes * @buf: the data to write * - * NAND write out-of-band + * NAND write with ECC */ -static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) +static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const uint8_t *buf) { - int column, page, status, ret = -EIO, chipnr; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; + int ret; - DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); + /* Do not allow reads past end of device */ + if ((to + len) > mtd->size) + return -EINVAL; + if (!len) + return 0; - /* Shift to get page */ - page = (int)(to >> this->page_shift); - chipnr = (int)(to >> this->chip_shift); + nand_get_device(chip, mtd, FL_READING); + + chip->ops.len = len; + chip->ops.datbuf = (uint8_t *)buf; + chip->ops.oobbuf = NULL; - /* Mask to get column */ - column = to & (mtd->oobsize - 1); + ret = nand_do_write_ops(mtd, to, &chip->ops); - /* Initialize return length value */ - *retlen = 0; + nand_release_device(mtd); + + *retlen = chip->ops.retlen; + return ret; +} + +/** + * nand_do_write_oob - [MTD Interface] NAND write out-of-band + * @mtd: MTD device structure + * @to: offset to write to + * @ops: oob operation description structure + * + * NAND write out-of-band + */ +static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, + struct mtd_oob_ops *ops) +{ + int chipnr, page, status; + struct nand_chip *chip = mtd->priv; + + DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", + (unsigned int)to, (int)ops->len); /* Do not allow write past end of page */ - if ((column + len) > mtd->oobsize) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: Attempt to write past end of page\n"); + if ((ops->ooboffs + ops->len) > mtd->oobsize) { + DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " + "Attempt to write past end of page\n"); return -EINVAL; } - /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); + chipnr = (int)(to >> chip->chip_shift); + chip->select_chip(mtd, chipnr); - /* Select the NAND device */ - this->select_chip(mtd, chipnr); + /* Shift to get page */ + page = (int)(to >> chip->page_shift); - /* Reset the chip. Some chips (like the Toshiba TC5832DC found - in one of my DiskOnChip 2000 test units) will clear the whole - data page too if we don't do this. I have no clue why, but - I seem to have 'fixed' it in the doc2000 driver in - August 1999. dwmw2. */ - this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); + /* + * Reset the chip. Some chips (like the Toshiba TC5832DC found in one + * of my DiskOnChip 2000 test units) will clear the whole data page too + * if we don't do this. I have no clue why, but I seem to have 'fixed' + * it in the doc2000 driver in August 1999. dwmw2. + */ + chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); /* Check, if it is write protected */ if (nand_check_wp(mtd)) - goto out; + return -EROFS; /* Invalidate the page cache, if we write to the cached page */ - if (page == this->pagebuf) - this->pagebuf = -1; - - if (NAND_MUST_PAD(this)) { - /* Write out desired data */ - this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & this->pagemask); - /* prepad 0xff for partial programming */ - this->write_buf(mtd, ffchars, column); - /* write data */ - this->write_buf(mtd, buf, len); - /* postpad 0xff for partial programming */ - this->write_buf(mtd, ffchars, mtd->oobsize - (len + column)); + 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 { - /* Write out desired data */ - this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask); - /* write data */ - this->write_buf(mtd, buf, len); + 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 */ - this->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); - status = this->waitfunc(mtd, this, FL_WRITING); + status = chip->waitfunc(mtd, chip, FL_WRITING); /* 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); - ret = -EIO; - goto out; + DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " + "Failed write, page 0x%08x\n", page); + return -EIO; } - /* Return happy */ - *retlen = len; + ops->retlen = ops->len; #ifdef CONFIG_MTD_NAND_VERIFY_WRITE - /* Send command to read back the data */ - this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask); + 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; +} + +/** + * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band + * @mtd: MTD device structure + * @from: offset to read from + * @ops: oob operation description structure + */ +static int nand_write_oob(struct mtd_info *mtd, loff_t to, + struct mtd_oob_ops *ops) +{ + void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf) = NULL; + struct nand_chip *chip = mtd->priv; + int ret = -ENOTSUPP; - if (this->verify_buf(mtd, buf, len)) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page); - ret = -EIO; + ops->retlen = 0; + + /* Do not allow writes past end of device */ + if ((to + ops->len) > mtd->size) { + DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " + "Attempt read beyond end of device\n"); + return -EINVAL; + } + + nand_get_device(chip, mtd, FL_READING); + + switch(ops->mode) { + case MTD_OOB_PLACE: + case MTD_OOB_AUTO: + break; + + case MTD_OOB_RAW: + /* Replace the write_page algorithm temporary */ + write_page = chip->ecc.write_page; + chip->ecc.write_page = nand_write_page_raw; + break; + + default: goto out; } -#endif - ret = 0; + + if (!ops->datbuf) + ret = nand_do_write_oob(mtd, to, ops); + else + ret = nand_do_write_ops(mtd, to, ops); + + if (unlikely(ops->mode == MTD_OOB_RAW)) + chip->ecc.write_page = write_page; out: - /* Deselect and wake up anyone waiting on the device */ nand_release_device(mtd); - return ret; } @@ -1813,10 +1697,10 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r */ static void single_erase_cmd(struct mtd_info *mtd, int page) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; /* Send commands to erase a block */ - this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); - this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); + chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); + chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); } /** @@ -1829,13 +1713,13 @@ static void single_erase_cmd(struct mtd_info *mtd, int page) */ static void multi_erase_cmd(struct mtd_info *mtd, int page) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; /* Send commands to erase a block */ - this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); - this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); - this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); - this->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); - this->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); + chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); + chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); + chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); + chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); + chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); } /** @@ -1852,71 +1736,75 @@ static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) #define BBT_PAGE_MASK 0xffffff3f /** - * nand_erase_intern - [NAND Interface] erase block(s) + * nand_erase_nand - [Internal] erase block(s) * @mtd: MTD device structure * @instr: erase instruction * @allowbbt: allow erasing the bbt area * * Erase one ore more blocks */ -int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt) +int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, + int allowbbt) { int page, len, status, pages_per_block, ret, chipnr; - struct nand_chip *this = mtd->priv; - int rewrite_bbt[NAND_MAX_CHIPS]={0}; /* flags to indicate the page, if bbt needs to be rewritten. */ - unsigned int bbt_masked_page; /* bbt mask to compare to page being erased. */ - /* It is used to see if the current page is in the same */ - /* 256 block group and the same bank as the bbt. */ + struct nand_chip *chip = mtd->priv; + int rewrite_bbt[NAND_MAX_CHIPS]={0}; + unsigned int bbt_masked_page = 0xffffffff; - DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", (unsigned int)instr->addr, (unsigned int)instr->len); + DEBUG(MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", + (unsigned int)instr->addr, (unsigned int)instr->len); /* Start address must align on block boundary */ - if (instr->addr & ((1 << this->phys_erase_shift) - 1)) { + if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) { DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); return -EINVAL; } /* Length must align on block boundary */ - if (instr->len & ((1 << this->phys_erase_shift) - 1)) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Length not block aligned\n"); + if (instr->len & ((1 << chip->phys_erase_shift) - 1)) { + DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " + "Length not block aligned\n"); return -EINVAL; } /* Do not allow erase past end of device */ if ((instr->len + instr->addr) > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Erase past end of device\n"); + DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " + "Erase past end of device\n"); return -EINVAL; } instr->fail_addr = 0xffffffff; /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_ERASING); + nand_get_device(chip, mtd, FL_ERASING); /* Shift to get first page */ - page = (int)(instr->addr >> this->page_shift); - chipnr = (int)(instr->addr >> this->chip_shift); + page = (int)(instr->addr >> chip->page_shift); + chipnr = (int)(instr->addr >> chip->chip_shift); /* Calculate pages in each block */ - pages_per_block = 1 << (this->phys_erase_shift - this->page_shift); + pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift); /* Select the NAND device */ - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, chipnr); - /* Check the WP bit */ /* Check, if it is write protected */ if (nand_check_wp(mtd)) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: Device is write protected!!!\n"); + DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " + "Device is write protected!!!\n"); instr->state = MTD_ERASE_FAILED; goto erase_exit; } - /* if BBT requires refresh, set the BBT page mask to see if the BBT should be rewritten */ - if (this->options & BBT_AUTO_REFRESH) { - bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; - } else { - bbt_masked_page = 0xffffffff; /* should not match anything */ - } + /* + * If BBT requires refresh, set the BBT page mask to see if the BBT + * should be rewritten. Otherwise the mask is set to 0xffffffff which + * can not be matched. This is also done when the bbt is actually + * erased to avoid recusrsive updates + */ + if (chip->options & BBT_AUTO_REFRESH && !allowbbt) + bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK; /* Loop through the pages */ len = instr->len; @@ -1924,59 +1812,72 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt instr->state = MTD_ERASING; while (len) { - /* Check if we have a bad block, we do not erase bad blocks ! */ - if (nand_block_checkbad(mtd, ((loff_t) page) << this->page_shift, 0, allowbbt)) { - printk(KERN_WARNING "nand_erase: attempt to erase a bad block at page 0x%08x\n", page); + /* + * heck if we have a bad block, we do not erase bad blocks ! + */ + if (nand_block_checkbad(mtd, ((loff_t) page) << + chip->page_shift, 0, allowbbt)) { + printk(KERN_WARNING "nand_erase: attempt to erase a " + "bad block at page 0x%08x\n", page); instr->state = MTD_ERASE_FAILED; goto erase_exit; } - /* Invalidate the page cache, if we erase the block which contains - the current cached page */ - if (page <= this->pagebuf && this->pagebuf < (page + pages_per_block)) - this->pagebuf = -1; + /* + * Invalidate the page cache, if we erase the block which + * contains the current cached page + */ + if (page <= chip->pagebuf && chip->pagebuf < + (page + pages_per_block)) + chip->pagebuf = -1; - this->erase_cmd(mtd, page & this->pagemask); + chip->erase_cmd(mtd, page & chip->pagemask); - status = this->waitfunc(mtd, this, FL_ERASING); + status = chip->waitfunc(mtd, chip, FL_ERASING); - /* See if operation failed and additional status checks are available */ - if ((status & NAND_STATUS_FAIL) && (this->errstat)) { - status = this->errstat(mtd, this, FL_ERASING, status, page); - } + /* + * See if operation failed and additional status checks are + * available + */ + if ((status & NAND_STATUS_FAIL) && (chip->errstat)) + status = chip->errstat(mtd, chip, FL_ERASING, + status, page); /* See if block erase succeeded */ if (status & NAND_STATUS_FAIL) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " "Failed erase, page 0x%08x\n", page); + DEBUG(MTD_DEBUG_LEVEL0, "nand_erase: " + "Failed erase, page 0x%08x\n", page); instr->state = MTD_ERASE_FAILED; - instr->fail_addr = (page << this->page_shift); + instr->fail_addr = (page << chip->page_shift); goto erase_exit; } - /* if BBT requires refresh, set the BBT rewrite flag to the page being erased */ - if (this->options & BBT_AUTO_REFRESH) { - if (((page & BBT_PAGE_MASK) == bbt_masked_page) && - (page != this->bbt_td->pages[chipnr])) { - rewrite_bbt[chipnr] = (page << this->page_shift); - } - } + /* + * If BBT requires refresh, set the BBT rewrite flag to the + * page being erased + */ + if (bbt_masked_page != 0xffffffff && + (page & BBT_PAGE_MASK) == bbt_masked_page) + rewrite_bbt[chipnr] = (page << chip->page_shift); /* Increment page address and decrement length */ - len -= (1 << this->phys_erase_shift); + len -= (1 << chip->phys_erase_shift); page += pages_per_block; /* Check, if we cross a chip boundary */ - if (len && !(page & this->pagemask)) { + if (len && !(page & chip->pagemask)) { chipnr++; - this->select_chip(mtd, -1); - this->select_chip(mtd, chipnr); - - /* if BBT requires refresh and BBT-PERCHIP, - * set the BBT page mask to see if this BBT should be rewritten */ - if ((this->options & BBT_AUTO_REFRESH) && (this->bbt_td->options & NAND_BBT_PERCHIP)) { - bbt_masked_page = this->bbt_td->pages[chipnr] & BBT_PAGE_MASK; - } + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); + /* + * If BBT requires refresh and BBT-PERCHIP, set the BBT + * page mask to see if this BBT should be rewritten + */ + if (bbt_masked_page != 0xffffffff && + (chip->bbt_td->options & NAND_BBT_PERCHIP)) + bbt_masked_page = chip->bbt_td->pages[chipnr] & + BBT_PAGE_MASK; } } instr->state = MTD_ERASE_DONE; @@ -1991,16 +1892,21 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt /* Deselect and wake up anyone waiting on the device */ nand_release_device(mtd); - /* if BBT requires refresh and erase was successful, rewrite any selected bad block tables */ - if ((this->options & BBT_AUTO_REFRESH) && (!ret)) { - for (chipnr = 0; chipnr < this->numchips; chipnr++) { - if (rewrite_bbt[chipnr]) { - /* update the BBT for chip */ - DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt (%d:0x%0x 0x%0x)\n", - chipnr, rewrite_bbt[chipnr], this->bbt_td->pages[chipnr]); - nand_update_bbt(mtd, rewrite_bbt[chipnr]); - } - } + /* + * If BBT requires refresh and erase was successful, rewrite any + * selected bad block tables + */ + if (bbt_masked_page == 0xffffffff || ret) + return ret; + + for (chipnr = 0; chipnr < chip->numchips; chipnr++) { + if (!rewrite_bbt[chipnr]) + continue; + /* update the BBT for chip */ + DEBUG(MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt " + "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr], + chip->bbt_td->pages[chipnr]); + nand_update_bbt(mtd, rewrite_bbt[chipnr]); } /* Return more or less happy */ @@ -2015,38 +1921,38 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, int allowbbt */ static void nand_sync(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; DEBUG(MTD_DEBUG_LEVEL3, "nand_sync: called\n"); /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_SYNCING); + nand_get_device(chip, mtd, FL_SYNCING); /* Release it and go back */ nand_release_device(mtd); } /** - * nand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad + * nand_block_isbad - [MTD Interface] Check if block at offset is bad * @mtd: MTD device structure * @ofs: offset relative to mtd start */ -static int nand_block_isbad(struct mtd_info *mtd, loff_t ofs) +static int nand_block_isbad(struct mtd_info *mtd, loff_t offs) { /* Check for invalid offset */ - if (ofs > mtd->size) + if (offs > mtd->size) return -EINVAL; - return nand_block_checkbad(mtd, ofs, 1, 0); + return nand_block_checkbad(mtd, offs, 1, 0); } /** - * nand_block_markbad - [MTD Interface] Mark the block at the given offset as bad + * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad * @mtd: MTD device structure * @ofs: offset relative to mtd start */ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; int ret; if ((ret = nand_block_isbad(mtd, ofs))) { @@ -2056,7 +1962,7 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) return ret; } - return this->block_markbad(mtd, ofs); + return chip->block_markbad(mtd, ofs); } /** @@ -2065,9 +1971,9 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) */ static int nand_suspend(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; - return nand_get_device(this, mtd, FL_PM_SUSPENDED); + return nand_get_device(chip, mtd, FL_PM_SUSPENDED); } /** @@ -2076,9 +1982,9 @@ static int nand_suspend(struct mtd_info *mtd) */ static void nand_resume(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; - if (this->state == FL_PM_SUSPENDED) + if (chip->state == FL_PM_SUSPENDED) nand_release_device(mtd); else printk(KERN_ERR "nand_resume() called for a chip which is not " @@ -2086,116 +1992,68 @@ static void nand_resume(struct mtd_info *mtd) } /* - * Free allocated data structures - */ -static void nand_free_kmem(struct nand_chip *this) -{ - /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_OOBBUF_ALLOC) - kfree(this->oob_buf); - /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_DATABUF_ALLOC) - kfree(this->data_buf); - /* Controller allocated by nand_scan ? */ - if (this->options & NAND_CONTROLLER_ALLOC) - kfree(this->controller); -} - -/* - * Allocate buffers and data structures - */ -static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this) -{ - size_t len; - - if (!this->oob_buf) { - len = mtd->oobsize << - (this->phys_erase_shift - this->page_shift); - this->oob_buf = kmalloc(len, GFP_KERNEL); - if (!this->oob_buf) - goto outerr; - this->options |= NAND_OOBBUF_ALLOC; - } - - if (!this->data_buf) { - len = mtd->writesize + mtd->oobsize; - this->data_buf = kmalloc(len, GFP_KERNEL); - if (!this->data_buf) - goto outerr; - this->options |= NAND_DATABUF_ALLOC; - } - - if (!this->controller) { - this->controller = kzalloc(sizeof(struct nand_hw_control), - GFP_KERNEL); - if (!this->controller) - goto outerr; - this->options |= NAND_CONTROLLER_ALLOC; - } - return 0; - - outerr: - printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n"); - nand_free_kmem(this); - return -ENOMEM; -} - -/* * Set default functions */ -static void nand_set_defaults(struct nand_chip *this, int busw) +static void nand_set_defaults(struct nand_chip *chip, int busw) { /* check for proper chip_delay setup, set 20us if not */ - if (!this->chip_delay) - this->chip_delay = 20; + if (!chip->chip_delay) + chip->chip_delay = 20; /* check, if a user supplied command function given */ - if (this->cmdfunc == NULL) - this->cmdfunc = nand_command; + if (chip->cmdfunc == NULL) + chip->cmdfunc = nand_command; /* check, if a user supplied wait function given */ - if (this->waitfunc == NULL) - this->waitfunc = nand_wait; - - if (!this->select_chip) - this->select_chip = nand_select_chip; - if (!this->read_byte) - this->read_byte = busw ? nand_read_byte16 : nand_read_byte; - if (!this->read_word) - this->read_word = nand_read_word; - if (!this->block_bad) - this->block_bad = nand_block_bad; - if (!this->block_markbad) - this->block_markbad = nand_default_block_markbad; - if (!this->write_buf) - this->write_buf = busw ? nand_write_buf16 : nand_write_buf; - if (!this->read_buf) - this->read_buf = busw ? nand_read_buf16 : nand_read_buf; - if (!this->verify_buf) - this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; - if (!this->scan_bbt) - this->scan_bbt = nand_default_bbt; + if (chip->waitfunc == NULL) + chip->waitfunc = nand_wait; + + if (!chip->select_chip) + chip->select_chip = nand_select_chip; + if (!chip->read_byte) + chip->read_byte = busw ? nand_read_byte16 : nand_read_byte; + if (!chip->read_word) + chip->read_word = nand_read_word; + if (!chip->block_bad) + chip->block_bad = nand_block_bad; + if (!chip->block_markbad) + chip->block_markbad = nand_default_block_markbad; + if (!chip->write_buf) + chip->write_buf = busw ? nand_write_buf16 : nand_write_buf; + if (!chip->read_buf) + chip->read_buf = busw ? nand_read_buf16 : nand_read_buf; + if (!chip->verify_buf) + chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; + if (!chip->scan_bbt) + chip->scan_bbt = nand_default_bbt; + + if (!chip->controller) { + chip->controller = &chip->hwcontrol; + spin_lock_init(&chip->controller->lock); + init_waitqueue_head(&chip->controller->wq); + } + } /* - * Get the flash and manufacturer id and lookup if the typ is supported + * Get the flash and manufacturer id and lookup if the type is supported */ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, - struct nand_chip *this, + struct nand_chip *chip, int busw, int *maf_id) { struct nand_flash_dev *type = NULL; int i, dev_id, maf_idx; /* Select the device */ - this->select_chip(mtd, 0); + chip->select_chip(mtd, 0); /* Send the command for reading device ID */ - this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); + chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); /* Read manufacturer and device IDs */ - *maf_id = this->read_byte(mtd); - dev_id = this->read_byte(mtd); + *maf_id = chip->read_byte(mtd); + dev_id = chip->read_byte(mtd); /* Lookup the flash id */ for (i = 0; nand_flash_ids[i].name != NULL; i++) { @@ -2208,15 +2066,18 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, if (!type) return ERR_PTR(-ENODEV); - this->chipsize = nand_flash_ids[i].chipsize << 20; + if (!mtd->name) + mtd->name = type->name; + + chip->chipsize = type->chipsize << 20; /* Newer devices have all the information in additional id bytes */ - if (!nand_flash_ids[i].pagesize) { + if (!type->pagesize) { int extid; /* The 3rd id byte contains non relevant data ATM */ - extid = this->read_byte(mtd); + extid = chip->read_byte(mtd); /* The 4th id byte is the important one */ - extid = this->read_byte(mtd); + extid = chip->read_byte(mtd); /* Calc pagesize */ mtd->writesize = 1024 << (extid & 0x3); extid >>= 2; @@ -2231,12 +2092,12 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, } else { /* - * Old devices have this data hardcoded in the device id table + * Old devices have chip data hardcoded in the device id table */ - mtd->erasesize = nand_flash_ids[i].erasesize; - mtd->writesize = nand_flash_ids[i].pagesize; + mtd->erasesize = type->erasesize; + mtd->writesize = type->pagesize; mtd->oobsize = mtd->writesize / 32; - busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; + busw = type->options & NAND_BUSWIDTH_16; } /* Try to identify manufacturer */ @@ -2247,55 +2108,55 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, /* * Check, if buswidth is correct. Hardware drivers should set - * this correct ! + * chip correct ! */ - if (busw != (this->options & NAND_BUSWIDTH_16)) { + if (busw != (chip->options & NAND_BUSWIDTH_16)) { printk(KERN_INFO "NAND device: Manufacturer ID:" " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, nand_manuf_ids[maf_idx].name, mtd->name); printk(KERN_WARNING "NAND bus width %d instead %d bit\n", - (this->options & NAND_BUSWIDTH_16) ? 16 : 8, + (chip->options & NAND_BUSWIDTH_16) ? 16 : 8, busw ? 16 : 8); return ERR_PTR(-EINVAL); } /* Calculate the address shift from the page size */ - this->page_shift = ffs(mtd->writesize) - 1; + chip->page_shift = ffs(mtd->writesize) - 1; /* Convert chipsize to number of pages per chip -1. */ - this->pagemask = (this->chipsize >> this->page_shift) - 1; + chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; - this->bbt_erase_shift = this->phys_erase_shift = + chip->bbt_erase_shift = chip->phys_erase_shift = ffs(mtd->erasesize) - 1; - this->chip_shift = ffs(this->chipsize) - 1; + chip->chip_shift = ffs(chip->chipsize) - 1; /* Set the bad block position */ - this->badblockpos = mtd->writesize > 512 ? + chip->badblockpos = mtd->writesize > 512 ? NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; /* Get chip options, preserve non chip based options */ - this->options &= ~NAND_CHIPOPTIONS_MSK; - this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK; + chip->options &= ~NAND_CHIPOPTIONS_MSK; + chip->options |= type->options & NAND_CHIPOPTIONS_MSK; /* - * Set this as a default. Board drivers can override it, if necessary + * Set chip as a default. Board drivers can override it, if necessary */ - this->options |= NAND_NO_AUTOINCR; + chip->options |= NAND_NO_AUTOINCR; - /* Check if this is a not a samsung device. Do not clear the + /* Check if chip is a not a samsung device. Do not clear the * options for chips which are not having an extended id. */ - if (*maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize) - this->options &= ~NAND_SAMSUNG_LP_OPTIONS; + if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize) + chip->options &= ~NAND_SAMSUNG_LP_OPTIONS; /* Check for AND chips with 4 page planes */ - if (this->options & NAND_4PAGE_ARRAY) - this->erase_cmd = multi_erase_cmd; + if (chip->options & NAND_4PAGE_ARRAY) + chip->erase_cmd = multi_erase_cmd; else - this->erase_cmd = single_erase_cmd; + chip->erase_cmd = single_erase_cmd; /* Do not replace user supplied command function ! */ - if (mtd->writesize > 512 && this->cmdfunc == nand_command) - this->cmdfunc = nand_command_lp; + if (mtd->writesize > 512 && chip->cmdfunc == nand_command) + chip->cmdfunc = nand_command_lp; printk(KERN_INFO "NAND device: Manufacturer ID:" " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, @@ -2322,15 +2183,14 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, * This fills out all the uninitialized function pointers * with the defaults. * The flash ID is read and the mtd/chip structures are - * filled with the appropriate values. Buffers are allocated if - * they are not provided by the board driver + * filled with the appropriate values. * The mtd->owner field must be set to the module of the caller * */ int nand_scan(struct mtd_info *mtd, int maxchips) { int i, busw, nand_maf_id; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; struct nand_flash_dev *type; /* Many callers got this wrong, so check for it for a while... */ @@ -2340,57 +2200,52 @@ int nand_scan(struct mtd_info *mtd, int maxchips) } /* Get buswidth to select the correct functions */ - busw = this->options & NAND_BUSWIDTH_16; + busw = chip->options & NAND_BUSWIDTH_16; /* Set the default functions */ - nand_set_defaults(this, busw); + nand_set_defaults(chip, busw); /* Read the flash type */ - type = nand_get_flash_type(mtd, this, busw, &nand_maf_id); + type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id); if (IS_ERR(type)) { printk(KERN_WARNING "No NAND device found!!!\n"); - this->select_chip(mtd, -1); + chip->select_chip(mtd, -1); return PTR_ERR(type); } /* Check for a chip array */ for (i = 1; i < maxchips; i++) { - this->select_chip(mtd, i); + chip->select_chip(mtd, i); /* Send the command for reading device ID */ - this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); + chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); /* Read manufacturer and device IDs */ - if (nand_maf_id != this->read_byte(mtd) || - type->id != this->read_byte(mtd)) + if (nand_maf_id != chip->read_byte(mtd) || + type->id != chip->read_byte(mtd)) break; } if (i > 1) printk(KERN_INFO "%d NAND chips detected\n", i); /* Store the number of chips and calc total size for mtd */ - this->numchips = i; - mtd->size = i * this->chipsize; - - /* Allocate buffers and data structures */ - if (nand_allocate_kmem(mtd, this)) - return -ENOMEM; + chip->numchips = i; + mtd->size = i * chip->chipsize; - /* Preset the internal oob buffer */ - memset(this->oob_buf, 0xff, - mtd->oobsize << (this->phys_erase_shift - this->page_shift)); + /* Preset the internal oob write buffer */ + memset(chip->buffers.oobwbuf, 0xff, mtd->oobsize); /* * If no default placement scheme is given, select an appropriate one */ - if (!this->autooob) { + if (!chip->ecc.layout) { switch (mtd->oobsize) { case 8: - this->autooob = &nand_oob_8; + chip->ecc.layout = &nand_oob_8; break; case 16: - this->autooob = &nand_oob_16; + chip->ecc.layout = &nand_oob_16; break; case 64: - this->autooob = &nand_oob_64; + chip->ecc.layout = &nand_oob_64; break; default: printk(KERN_WARNING "No oob scheme defined for " @@ -2400,72 +2255,88 @@ int nand_scan(struct mtd_info *mtd, int maxchips) } /* - * The number of bytes available for the filesystem to place fs - * dependend oob data - */ - mtd->oobavail = 0; - for (i = 0; this->autooob->oobfree[i][1]; i++) - mtd->oobavail += this->autooob->oobfree[i][1]; - - /* * check ECC mode, default to software if 3byte/512byte hardware ECC is * selected and we have 256 byte pagesize fallback to software ECC */ - switch (this->ecc.mode) { + switch (chip->ecc.mode) { case NAND_ECC_HW: + /* Use standard hwecc read page function ? */ + if (!chip->ecc.read_page) + chip->ecc.read_page = nand_read_page_hwecc; + if (!chip->ecc.write_page) + chip->ecc.write_page = nand_write_page_hwecc; + case NAND_ECC_HW_SYNDROME: - if (!this->ecc.calculate || !this->ecc.correct || - !this->ecc.hwctl) { + if (!chip->ecc.calculate || !chip->ecc.correct || + !chip->ecc.hwctl) { printk(KERN_WARNING "No ECC functions supplied, " "Hardware ECC not possible\n"); BUG(); } - if (mtd->writesize >= this->ecc.size) + /* Use standard syndrome read/write page function ? */ + if (!chip->ecc.read_page) + chip->ecc.read_page = nand_read_page_syndrome; + if (!chip->ecc.write_page) + chip->ecc.write_page = nand_write_page_syndrome; + + if (mtd->writesize >= chip->ecc.size) break; printk(KERN_WARNING "%d byte HW ECC not possible on " "%d byte page size, fallback to SW ECC\n", - this->ecc.size, mtd->writesize); - this->ecc.mode = NAND_ECC_SOFT; + chip->ecc.size, mtd->writesize); + chip->ecc.mode = NAND_ECC_SOFT; case NAND_ECC_SOFT: - this->ecc.calculate = nand_calculate_ecc; - this->ecc.correct = nand_correct_data; - this->ecc.size = 256; - this->ecc.bytes = 3; + chip->ecc.calculate = nand_calculate_ecc; + chip->ecc.correct = nand_correct_data; + chip->ecc.read_page = nand_read_page_swecc; + chip->ecc.write_page = nand_write_page_swecc; + chip->ecc.size = 256; + chip->ecc.bytes = 3; break; case NAND_ECC_NONE: printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " "This is not recommended !!\n"); - this->ecc.size = mtd->writesize; - this->ecc.bytes = 0; + chip->ecc.read_page = nand_read_page_raw; + chip->ecc.write_page = nand_write_page_raw; + chip->ecc.size = mtd->writesize; + chip->ecc.bytes = 0; break; default: printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", - this->ecc.mode); + chip->ecc.mode); BUG(); } /* + * The number of bytes available for a client to place data into + * the out of band area + */ + chip->ecc.layout->oobavail = 0; + for (i = 0; chip->ecc.layout->oobfree[i].length; i++) + chip->ecc.layout->oobavail += + chip->ecc.layout->oobfree[i].length; + + /* * Set the number of read / write steps for one page depending on ECC * mode */ - this->ecc.steps = mtd->writesize / this->ecc.size; - if(this->ecc.steps * this->ecc.size != mtd->writesize) { + chip->ecc.steps = mtd->writesize / chip->ecc.size; + if(chip->ecc.steps * chip->ecc.size != mtd->writesize) { printk(KERN_WARNING "Invalid ecc parameters\n"); BUG(); } + chip->ecc.total = chip->ecc.steps * chip->ecc.bytes; - /* Initialize state, waitqueue and spinlock */ - this->state = FL_READY; - init_waitqueue_head(&this->controller->wq); - spin_lock_init(&this->controller->lock); + /* Initialize state */ + chip->state = FL_READY; /* De-select the device */ - this->select_chip(mtd, -1); + chip->select_chip(mtd, -1); /* Invalidate the pagebuffer reference */ - this->pagebuf = -1; + chip->pagebuf = -1; /* Fill in remaining MTD driver data */ mtd->type = MTD_NANDFLASH; @@ -2486,15 +2357,15 @@ int nand_scan(struct mtd_info *mtd, int maxchips) mtd->block_isbad = nand_block_isbad; mtd->block_markbad = nand_block_markbad; - /* and make the autooob the default one */ - memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo)); + /* propagate ecc.layout to mtd_info */ + mtd->ecclayout = chip->ecc.layout; /* Check, if we should skip the bad block table scan */ - if (this->options & NAND_SKIP_BBTSCAN) + if (chip->options & NAND_SKIP_BBTSCAN) return 0; /* Build bad block table */ - return this->scan_bbt(mtd); + return chip->scan_bbt(mtd); } /** @@ -2503,7 +2374,7 @@ int nand_scan(struct mtd_info *mtd, int maxchips) */ void nand_release(struct mtd_info *mtd) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; #ifdef CONFIG_MTD_PARTITIONS /* Deregister partitions */ @@ -2513,9 +2384,7 @@ void nand_release(struct mtd_info *mtd) del_mtd_device(mtd); /* Free bad block table memory */ - kfree(this->bbt); - /* Free buffers */ - nand_free_kmem(this); + kfree(chip->bbt); } EXPORT_SYMBOL_GPL(nand_scan);