diff options
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 1054 |
1 files changed, 520 insertions, 534 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 649c238837bb..6036d322bf68 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 <ben-mtd@fluff.org> - * - * 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. @@ -149,11 +107,11 @@ 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, +static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, 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, +static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *chip, int page, int numpages, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode); @@ -161,7 +119,7 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, #define nand_verify_pages(...) (0) #endif -static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, +static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state); /* @@ -178,17 +136,17 @@ DEFINE_LED_TRIGGER(nand_led_trigger); */ 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); } /** @@ -199,8 +157,8 @@ 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); } /** @@ -212,8 +170,8 @@ 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)); } /** @@ -225,8 +183,8 @@ 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); } /** @@ -236,15 +194,17 @@ 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); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, + NAND_NCE | NAND_CTRL_CHANGE); break; default: @@ -263,10 +223,10 @@ 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); } /** @@ -280,10 +240,10 @@ 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); } /** @@ -297,10 +257,10 @@ 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; @@ -317,12 +277,12 @@ 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); } @@ -337,12 +297,12 @@ 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); } /** @@ -356,12 +316,12 @@ 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; @@ -378,40 +338,37 @@ 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; } @@ -426,22 +383,22 @@ 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; /* 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) + if (chip->options & NAND_USE_FLASH_BBT) return nand_update_bbt(mtd, ofs); /* We write two bytes, so we dont have to mess with 16 bit access */ - ofs += mtd->oobsize + (this->badblockpos & ~0x01); + ofs += mtd->oobsize + (chip->badblockpos & ~0x01); return nand_write_oob(mtd, ofs, 2, &retlen, buf); } @@ -454,10 +411,10 @@ 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; } /** @@ -473,10 +430,10 @@ 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); @@ -488,13 +445,13 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, */ 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)); @@ -514,7 +471,7 @@ 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; /* @@ -534,10 +491,10 @@ 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 @@ -546,20 +503,20 @@ 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 @@ -572,17 +529,17 @@ 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); + while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; return; /* This applies to read commands */ @@ -591,8 +548,8 @@ 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; } } @@ -618,7 +575,7 @@ 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) { @@ -627,7 +584,7 @@ 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) { @@ -636,23 +593,23 @@ 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 @@ -677,21 +634,21 @@ 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); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); + 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); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); /* This applies to read commands */ default: @@ -699,8 +656,8 @@ 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; } } @@ -721,27 +678,27 @@ 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); @@ -762,7 +719,7 @@ 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; @@ -779,28 +736,28 @@ 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; } @@ -808,7 +765,7 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) * 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) + * @page: startpage inside the chip, must be called with (page & chip->pagemask) * @oob_buf: out of band data buffer * @oobsel: out of band selecttion structre * @cached: 1 = enable cached programming if supported by chip @@ -819,75 +776,75 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *this, int state) * * Cached programming is not supported yet. */ -static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, +static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, int page, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached) { int i, status; uint8_t ecc_code[32]; - int eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; + int eccmode = oobsel->useecc ? chip->ecc.mode : NAND_ECC_NONE; int *oob_config = oobsel->eccpos; - int datidx = 0, eccidx = 0, eccsteps = this->ecc.steps; + int datidx = 0, eccidx = 0, eccsteps = chip->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->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); /* 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); + chip->write_buf(mtd, chip->data_poi, mtd->writesize); break; /* Software ecc 3/256, write all */ case NAND_ECC_SOFT: for (; eccsteps; eccsteps--) { - this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); + chip->ecc.calculate(mtd, &chip->data_poi[datidx], ecc_code); for (i = 0; i < 3; i++, eccidx++) oob_buf[oob_config[eccidx]] = ecc_code[i]; - datidx += this->ecc.size; + datidx += chip->ecc.size; } - this->write_buf(mtd, this->data_poi, mtd->writesize); + chip->write_buf(mtd, chip->data_poi, mtd->writesize); break; default: - eccbytes = this->ecc.bytes; + eccbytes = chip->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); + chip->ecc.hwctl(mtd, NAND_ECC_WRITE); + chip->write_buf(mtd, &chip->data_poi[datidx], chip->ecc.size); + chip->ecc.calculate(mtd, &chip->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; + if (chip->options & NAND_HWECC_SYNDROME) + chip->write_buf(mtd, ecc_code, eccbytes); + datidx += chip->ecc.size; } break; } /* Write out OOB data */ - if (this->options & NAND_HWECC_SYNDROME) - this->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); + if (chip->options & NAND_HWECC_SYNDROME) + chip->write_buf(mtd, &oob_buf[oobsel->eccbytes], mtd->oobsize - oobsel->eccbytes); else - this->write_buf(mtd, oob_buf, mtd->oobsize); + chip->write_buf(mtd, oob_buf, mtd->oobsize); /* Send command to actually program the data */ - this->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); + chip->cmdfunc(mtd, cached ? NAND_CMD_CACHEDPROG : NAND_CMD_PAGEPROG, -1, -1); if (!cached) { /* call wait ready function */ - status = this->waitfunc(mtd, this, FL_WRITING); + status = chip->waitfunc(mtd, chip, FL_WRITING); /* 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); + if ((status & NAND_STATUS_FAIL) && (chip->errstat)) { + status = chip->errstat(mtd, chip, FL_WRITING, status, page); } /* See if device thinks it succeeded */ @@ -898,7 +855,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag } else { /* FIXME: Implement cached programming ! */ /* wait until cache is ready */ - // status = this->waitfunc (mtd, this, FL_CACHEDRPG); + // status = chip->waitfunc (mtd, this, FL_CACHEDRPG); } return 0; } @@ -908,7 +865,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag * 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) + * @page: startpage inside the chip, must be called with (page & chip->pagemask) * @numpages: number of pages to verify * @oob_buf: out of band data buffer * @oobsel: out of band selecttion structre @@ -923,23 +880,23 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag * 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. */ -static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, +static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *chip, int page, int numpages, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) { int i, j, datidx = 0, oobofs = 0, res = -EIO; - int eccsteps = this->eccsteps; + int eccsteps = chip->eccsteps; int hweccbytes; uint8_t oobdata[64]; - hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; + hweccbytes = (chip->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; /* Send command to read back the first page */ - this->cmdfunc(mtd, NAND_CMD_READ0, 0, page); + chip->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)) { + if (chip->verify_buf(mtd, &chip->data_poi[datidx], mtd->eccsize)) { DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); goto out; } @@ -947,7 +904,7 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int p /* Have we a hw generator layout ? */ if (!hweccbytes) continue; - if (this->verify_buf(mtd, &this->oob_buf[oobofs], hweccbytes)) { + if (chip->verify_buf(mtd, &chip->oob_buf[oobofs], hweccbytes)) { DEBUG(MTD_DEBUG_LEVEL0, "%s: " "Failed write verify, page 0x%08x ", __FUNCTION__, page); goto out; } @@ -958,13 +915,13 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int p * compare the ecc bytes */ if (oobmode) { - if (this->verify_buf(mtd, &oob_buf[oobofs], mtd->oobsize - hweccbytes * eccsteps)) { + if (chip->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); + chip->read_buf(mtd, oobdata, mtd->oobsize - hweccbytes * eccsteps); if (oobsel->useecc != MTD_NANDECC_OFF && !hweccbytes) { int ecccnt = oobsel->eccbytes; @@ -990,8 +947,8 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int p * Do this also before returning, so the chip is * ready for the next command. */ - if (!this->dev_ready) - udelay(this->chip_delay); + if (!chip->dev_ready) + udelay(chip->chip_delay); else nand_wait_ready(mtd); @@ -1001,14 +958,14 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int p /* Check, if the chip supports auto page increment */ if (!NAND_CANAUTOINCR(this)) - this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); + chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); } /* * 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); + chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); return res; } #endif @@ -1051,13 +1008,13 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, 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; + struct nand_chip *chip = 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 blockcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; int eccbytes; int compareecc = 1; int oobreadlen; @@ -1073,35 +1030,35 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, /* Grab the lock and see if the device is available */ if (flags & NAND_GET_DEVICE) - nand_get_device(this, mtd, FL_READING); + nand_get_device(chip, mtd, FL_READING); /* Autoplace of oob data ? Use the default placement scheme */ if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) - oobsel = this->autooob; + oobsel = chip->autooob; - eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; + eccmode = oobsel->useecc ? chip->ecc.mode : NAND_ECC_NONE; oob_config = oobsel->eccpos; /* Select the NAND device */ - chipnr = (int)(from >> this->chip_shift); - this->select_chip(mtd, chipnr); + chipnr = (int)(from >> chip->chip_shift); + chip->select_chip(mtd, chipnr); /* First we calculate the starting page */ - realpage = (int)(from >> this->page_shift); - page = realpage & this->pagemask; + realpage = (int)(from >> chip->page_shift); + page = realpage & chip->pagemask; /* Get raw starting column */ col = from & (mtd->writesize - 1); end = mtd->writesize; - ecc = this->ecc.size; - eccbytes = this->ecc.bytes; + ecc = chip->ecc.size; + eccbytes = chip->ecc.bytes; - if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) + if ((eccmode == NAND_ECC_NONE) || (chip->options & NAND_HWECC_SYNDROME)) compareecc = 0; oobreadlen = mtd->oobsize; - if (this->options & NAND_HWECC_SYNDROME) + if (chip->options & NAND_HWECC_SYNDROME) oobreadlen -= oobsel->eccbytes; /* Loop until all data read */ @@ -1115,32 +1072,32 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, if (aligned) data_poi = &buf[read]; else - data_poi = this->data_buf; + data_poi = chip->data_buf; /* 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) { + if (realpage == chip->pagebuf && !oob_buf) { /* aligned read ? */ if (aligned) - memcpy(data_poi, this->data_buf, end); + memcpy(data_poi, chip->data_buf, end); goto readdata; } /* Check, if we must send the read command */ if (sndcmd) { - this->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); + chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); sndcmd = 0; } /* 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]; + oob_data = &chip->data_buf[end]; - eccsteps = this->ecc.steps; + eccsteps = chip->ecc.steps; switch (eccmode) { case NAND_ECC_NONE:{ @@ -1151,46 +1108,46 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, "Reading data from NAND FLASH without ECC is not recommended\n"); lastwhinge = jiffies; } - this->read_buf(mtd, data_poi, end); + chip->read_buf(mtd, data_poi, end); break; } case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ - this->read_buf(mtd, data_poi, end); + chip->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]); + chip->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); break; 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); + chip->ecc.hwctl(mtd, NAND_ECC_READ); + chip->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); + chip->ecc.hwctl(mtd, NAND_ECC_READSYN); + chip->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]); + ecc_status = chip->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]); + chip->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); } } break; } /* read oobdata */ - this->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); + chip->read_buf(mtd, &oob_data[mtd->oobsize - oobreadlen], oobreadlen); /* Skip ECC check, if not requested (ECC_NONE or HW_ECC with syndromes) */ if (!compareecc) @@ -1201,8 +1158,8 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, ecc_code[j] = oob_data[oob_config[j]]; /* 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]); + for (i = 0, j = 0, datidx = 0; i < chip->ecc.steps; i++, datidx += ecc) { + ecc_status = chip->ecc.correct(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); /* Get next chunk of ecc bytes */ j += eccbytes; @@ -1239,7 +1196,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, break; case MTD_NANDECC_PLACE: /* YAFFS1 legacy mode */ - oob_data += this->ecc.steps * sizeof(int); + oob_data += chip->ecc.steps * sizeof(int); default: oob_data += mtd->oobsize; } @@ -1249,7 +1206,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, if (!aligned) { for (j = col; j < end && read < len; j++) buf[read++] = data_poi[j]; - this->pagebuf = realpage; + chip->pagebuf = realpage; } else read += mtd->writesize; @@ -1258,8 +1215,8 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, * 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); @@ -1271,17 +1228,17 @@ 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 & blockcheck)) sndcmd = 1; } @@ -1311,14 +1268,14 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, uint8_t *buf) { int i, col, page, chipnr; - struct nand_chip *this = mtd->priv; - int blockcheck = (1 << (this->phys_erase_shift - this->page_shift)) - 1; + struct nand_chip *chip = mtd->priv; + int blockcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08x, len = %i\n", (unsigned int)from, (int)len); /* Shift to get page */ - page = (int)(from >> this->page_shift); - chipnr = (int)(from >> this->chip_shift); + page = (int)(from >> chip->page_shift); + chipnr = (int)(from >> chip->chip_shift); /* Mask to get column */ col = from & (mtd->oobsize - 1); @@ -1334,13 +1291,13 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t * } /* 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); /* Send the read command */ - this->cmdfunc(mtd, NAND_CMD_READOOB, col, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_READOOB, col, page & chip->pagemask); /* * Read the data, if we read more than one page * oob data, let the device transfer the data ! @@ -1349,7 +1306,7 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t * while (i < len) { int thislen = mtd->oobsize - col; thislen = min_t(int, thislen, len); - this->read_buf(mtd, &buf[i], thislen); + chip->read_buf(mtd, &buf[i], thislen); i += thislen; /* Read more ? */ @@ -1358,10 +1315,10 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t * col = 0; /* Check, if we cross a chip boundary */ - if (!(page & this->pagemask)) { + if (!(page & chip->pagemask)) { chipnr++; - this->select_chip(mtd, -1); - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); } /* Apply delay or wait for ready/busy pin @@ -1369,17 +1326,17 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t * * 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)) { + if (!NAND_CANAUTOINCR(chip) || !(page & blockcheck)) { /* For subsequent page reads set offset to 0 */ - this->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_READOOB, 0x0, page & chip->pagemask); } } } @@ -1402,48 +1359,55 @@ static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t * * * Read raw data including oob into buffer */ -int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen) +int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, + size_t ooblen) { - struct nand_chip *this = mtd->priv; - int page = (int)(from >> this->page_shift); - int chip = (int)(from >> this->chip_shift); + struct nand_chip *chip = mtd->priv; + int page = (int)(from >> chip->page_shift); + int chipnr = (int)(from >> chip->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 blockcheck; /* 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"); + DEBUG(MTD_DEBUG_LEVEL0, "nand_read_raw: " + "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); + chip->select_chip(mtd, chipnr); /* Add requested oob length */ len += ooblen; + blockcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; while (len) { if (sndcmd) - this->cmdfunc(mtd, NAND_CMD_READ0, 0, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_READ0, 0, + page & chip->pagemask); sndcmd = 0; - this->read_buf(mtd, &buf[cnt], pagesize); + chip->read_buf(mtd, &buf[cnt], pagesize); len -= pagesize; cnt += pagesize; page++; - 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 */ - if (!NAND_CANAUTOINCR(this) || !(page & blockcheck)) + /* + * Check, if the chip supports auto page increment or if we + * cross a block boundary. + */ + if (!NAND_CANAUTOINCR(chip) || !(page & blockcheck)) sndcmd = 1; } @@ -1466,9 +1430,9 @@ int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, s int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, uint8_t *buf, uint8_t *oob) { - struct nand_chip *this = mtd->priv; - int page = (int)(to >> this->page_shift); - int chip = (int)(to >> this->chip_shift); + struct nand_chip *chip = mtd->priv; + int page = (int)(to >> chip->page_shift); + int chipnr = (int)(to >> chip->chip_shift); int ret; *retlen = 0; @@ -1481,18 +1445,18 @@ int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, } /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); + nand_get_device(chip, mtd, FL_WRITING); - this->select_chip(mtd, chip); - this->data_poi = buf; + chip->select_chip(mtd, chipnr); + chip->data_poi = buf; while (len != *retlen) { - ret = nand_write_page(mtd, this, page, oob, &mtd->oobinfo, 0); + ret = nand_write_page(mtd, chip, page, oob, &mtd->oobinfo, 0); if (ret) return ret; page++; *retlen += mtd->writesize; - this->data_poi += mtd->writesize; + chip->data_poi += mtd->writesize; oob += mtd->oobsize; } @@ -1528,7 +1492,7 @@ EXPORT_SYMBOL_GPL(nand_write_raw); static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct nand_oobinfo *oobsel, int autoplace, int numpages) { - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; int i, len, ofs; /* Zero copy fs supplied buffer */ @@ -1536,29 +1500,29 @@ static uint8_t *nand_prepare_oobbuf(struct mtd_info *mtd, uint8_t *fsbuf, struct return fsbuf; /* 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; + if (chip->oobdirty) { + memset(chip->oob_buf, 0xff, mtd->oobsize << (chip->phys_erase_shift - chip->page_shift)); + chip->oobdirty = 0; } /* If we have no autoplacement or no fs buffer use the internal one */ if (!autoplace || !fsbuf) - return this->oob_buf; + return chip->oob_buf; /* Walk through the pages and place the data */ - this->oobdirty = 1; + chip->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); + memcpy(&chip->oob_buf[to], fsbuf, num); len += num; fsbuf += num; } ofs += mtd->oobavail; } - return this->oob_buf; + return chip->oob_buf; } #define NOTALIGNED(x) (x & (mtd->writesize-1)) != 0 @@ -1578,9 +1542,9 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, { int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; int autoplace = 0, numpages, totalpages; - struct nand_chip *this = mtd->priv; + struct nand_chip *chip = mtd->priv; uint8_t *oobbuf, *bufstart, *eccbuf = NULL; - int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); + int ppblock = (1 << (chip->phys_erase_shift - chip->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); @@ -1601,12 +1565,12 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, } /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); + nand_get_device(chip, mtd, FL_WRITING); /* Calculate chipnr */ - chipnr = (int)(to >> this->chip_shift); + chipnr = (int)(to >> chip->chip_shift); /* Select the NAND device */ - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, chipnr); /* Check, if it is write protected */ if (nand_check_wp(mtd)) @@ -1614,21 +1578,21 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, /* Autoplace of oob data ? Use the default placement scheme */ if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) { - oobsel = this->autooob; + oobsel = chip->autooob; autoplace = 1; } if (oobsel->useecc == MTD_NANDECC_AUTOPL_USR) autoplace = 1; /* Setup variables and oob buffer */ - totalpages = len >> this->page_shift; - page = (int)(to >> this->page_shift); + totalpages = len >> chip->page_shift; + page = (int)(to >> chip->page_shift); /* Invalidate the page cache, if we write to the cached page */ - if (page <= this->pagebuf && this->pagebuf < (page + totalpages)) - this->pagebuf = -1; + if (page <= chip->pagebuf && chip->pagebuf < (page + totalpages)) + chip->pagebuf = -1; /* Set it relative to chip */ - page &= this->pagemask; + page &= chip->pagemask; startpage = page; /* Calc number of pages we can write in one go */ numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages); @@ -1638,13 +1602,13 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, /* Loop until all data is written */ while (written < len) { - this->data_poi = (uint8_t *) &buf[written]; + chip->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)); + ret = nand_write_page(mtd, chip, page, &oobbuf[oob], oobsel, (--numpages > 0)); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "nand_write: write_page failed %d\n", ret); goto out; @@ -1665,7 +1629,7 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, */ if (!(page & (ppblock - 1))) { int ofs; - this->data_poi = bufstart; + chip->data_poi = bufstart; ret = nand_verify_pages(mtd, this, startpage, page - startpage, oobbuf, oobsel, chipnr, (eccbuf != NULL)); if (ret) { @@ -1679,21 +1643,21 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, eccbuf += (page - startpage) * ofs; totalpages -= page - startpage; numpages = min(totalpages, ppblock); - page &= this->pagemask; + page &= chip->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->select_chip(mtd, -1); + chip->select_chip(mtd, chipnr); } } } /* Verify the remaining pages */ cmp: - this->data_poi = bufstart; + chip->data_poi = bufstart; ret = nand_verify_pages(mtd, this, startpage, totalpages, oobbuf, oobsel, chipnr, (eccbuf != NULL)); if (!ret) *retlen = written; @@ -1720,13 +1684,13 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, static int nand_write_oob(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; DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); /* Shift to get page */ - page = (int)(to >> this->page_shift); - chipnr = (int)(to >> this->chip_shift); + page = (int)(to >> chip->page_shift); + chipnr = (int)(to >> chip->chip_shift); /* Mask to get column */ column = to & (mtd->oobsize - 1); @@ -1741,45 +1705,45 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r } /* Grab the lock and see if the device is available */ - nand_get_device(this, mtd, FL_WRITING); + nand_get_device(chip, mtd, FL_WRITING); /* Select the NAND device */ - this->select_chip(mtd, chipnr); + chip->select_chip(mtd, chipnr); /* 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); + chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); /* Check, if it is write protected */ if (nand_check_wp(mtd)) goto out; /* Invalidate the page cache, if we write to the cached page */ - if (page == this->pagebuf) - this->pagebuf = -1; + if (page == chip->pagebuf) + chip->pagebuf = -1; - if (NAND_MUST_PAD(this)) { + if (NAND_MUST_PAD(chip)) { /* Write out desired data */ - this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page & chip->pagemask); /* prepad 0xff for partial programming */ - this->write_buf(mtd, ffchars, column); + chip->write_buf(mtd, ffchars, column); /* write data */ - this->write_buf(mtd, buf, len); + chip->write_buf(mtd, buf, len); /* postpad 0xff for partial programming */ - this->write_buf(mtd, ffchars, mtd->oobsize - (len + column)); + chip->write_buf(mtd, ffchars, mtd->oobsize - (len + column)); } else { /* Write out desired data */ - this->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize + column, page & chip->pagemask); /* write data */ - this->write_buf(mtd, buf, len); + chip->write_buf(mtd, buf, 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) { @@ -1792,9 +1756,9 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *r #ifdef CONFIG_MTD_NAND_VERIFY_WRITE /* Send command to read back the data */ - this->cmdfunc(mtd, NAND_CMD_READOOB, column, page & this->pagemask); + chip->cmdfunc(mtd, NAND_CMD_READOOB, column, page & chip->pagemask); - if (this->verify_buf(mtd, buf, len)) { + if (chip->verify_buf(mtd, buf, len)) { DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Failed write verify, page 0x%08x\n", page); ret = -EIO; goto out; @@ -1817,10 +1781,10 @@ 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); } /** @@ -1833,13 +1797,13 @@ 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); } /** @@ -1856,71 +1820,75 @@ 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; @@ -1928,59 +1896,72 @@ 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; @@ -1995,16 +1976,21 @@ 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 */ @@ -2019,38 +2005,38 @@ 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))) { @@ -2060,7 +2046,7 @@ 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); } /** @@ -2069,9 +2055,9 @@ 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); } /** @@ -2080,9 +2066,9 @@ 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 " @@ -2092,114 +2078,114 @@ static void nand_resume(struct mtd_info *mtd) /* * Free allocated data structures */ -static void nand_free_kmem(struct nand_chip *this) +static void nand_free_kmem(struct nand_chip *chip) { /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_OOBBUF_ALLOC) - kfree(this->oob_buf); + if (chip->options & NAND_OOBBUF_ALLOC) + kfree(chip->oob_buf); /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_DATABUF_ALLOC) - kfree(this->data_buf); + if (chip->options & NAND_DATABUF_ALLOC) + kfree(chip->data_buf); /* Controller allocated by nand_scan ? */ - if (this->options & NAND_CONTROLLER_ALLOC) - kfree(this->controller); + if (chip->options & NAND_CONTROLLER_ALLOC) + kfree(chip->controller); } /* * Allocate buffers and data structures */ -static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this) +static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *chip) { size_t len; - if (!this->oob_buf) { + if (!chip->oob_buf) { len = mtd->oobsize << - (this->phys_erase_shift - this->page_shift); - this->oob_buf = kmalloc(len, GFP_KERNEL); - if (!this->oob_buf) + (chip->phys_erase_shift - chip->page_shift); + chip->oob_buf = kmalloc(len, GFP_KERNEL); + if (!chip->oob_buf) goto outerr; - this->options |= NAND_OOBBUF_ALLOC; + chip->options |= NAND_OOBBUF_ALLOC; } - if (!this->data_buf) { + if (!chip->data_buf) { len = mtd->writesize + mtd->oobsize; - this->data_buf = kmalloc(len, GFP_KERNEL); - if (!this->data_buf) + chip->data_buf = kmalloc(len, GFP_KERNEL); + if (!chip->data_buf) goto outerr; - this->options |= NAND_DATABUF_ALLOC; + chip->options |= NAND_DATABUF_ALLOC; } - if (!this->controller) { - this->controller = kzalloc(sizeof(struct nand_hw_control), + if (!chip->controller) { + chip->controller = kzalloc(sizeof(struct nand_hw_control), GFP_KERNEL); - if (!this->controller) + if (!chip->controller) goto outerr; - this->options |= NAND_CONTROLLER_ALLOC; + chip->options |= NAND_CONTROLLER_ALLOC; } return 0; outerr: printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n"); - nand_free_kmem(this); + nand_free_kmem(chip); 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; } /* - * 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++) { @@ -2212,15 +2198,15 @@ 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; + chip->chipsize = nand_flash_ids[i].chipsize << 20; /* Newer devices have all the information in additional id bytes */ if (!nand_flash_ids[i].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; @@ -2235,7 +2221,7 @@ 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; @@ -2251,55 +2237,55 @@ 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 |= nand_flash_ids[i].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; + 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, @@ -2334,7 +2320,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, 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... */ @@ -2344,57 +2330,57 @@ 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; + chip->numchips = i; + mtd->size = i * chip->chipsize; /* Allocate buffers and data structures */ - if (nand_allocate_kmem(mtd, this)) + if (nand_allocate_kmem(mtd, chip)) return -ENOMEM; /* Preset the internal oob buffer */ - memset(this->oob_buf, 0xff, - mtd->oobsize << (this->phys_erase_shift - this->page_shift)); + memset(chip->oob_buf, 0xff, + mtd->oobsize << (chip->phys_erase_shift - chip->page_shift)); /* * If no default placement scheme is given, select an appropriate one */ - if (!this->autooob) { + if (!chip->autooob) { switch (mtd->oobsize) { case 8: - this->autooob = &nand_oob_8; + chip->autooob = &nand_oob_8; break; case 16: - this->autooob = &nand_oob_16; + chip->autooob = &nand_oob_16; break; case 64: - this->autooob = &nand_oob_64; + chip->autooob = &nand_oob_64; break; default: printk(KERN_WARNING "No oob scheme defined for " @@ -2408,45 +2394,45 @@ int nand_scan(struct mtd_info *mtd, int maxchips) * dependend oob data */ mtd->oobavail = 0; - for (i = 0; this->autooob->oobfree[i][1]; i++) - mtd->oobavail += this->autooob->oobfree[i][1]; + for (i = 0; chip->autooob->oobfree[i][1]; i++) + mtd->oobavail += chip->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: 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) + 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.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.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(); } @@ -2454,22 +2440,22 @@ int nand_scan(struct mtd_info *mtd, int maxchips) * 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(); } /* Initialize state, waitqueue and spinlock */ - this->state = FL_READY; - init_waitqueue_head(&this->controller->wq); - spin_lock_init(&this->controller->lock); + chip->state = FL_READY; + init_waitqueue_head(&chip->controller->wq); + spin_lock_init(&chip->controller->lock); /* 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; @@ -2491,14 +2477,14 @@ int nand_scan(struct mtd_info *mtd, int maxchips) mtd->block_markbad = nand_block_markbad; /* and make the autooob the default one */ - memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo)); + memcpy(&mtd->oobinfo, chip->autooob, sizeof(mtd->oobinfo)); /* 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); } /** @@ -2507,7 +2493,7 @@ 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 */ @@ -2517,9 +2503,9 @@ void nand_release(struct mtd_info *mtd) del_mtd_device(mtd); /* Free bad block table memory */ - kfree(this->bbt); + kfree(chip->bbt); /* Free buffers */ - nand_free_kmem(this); + nand_free_kmem(chip); } EXPORT_SYMBOL_GPL(nand_scan); |
