Loading drivers/mtd/nand/nand_base.c +62 −42 Original line number Diff line number Diff line Loading @@ -25,26 +25,30 @@ * 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. * 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 * Loading Loading @@ -132,32 +136,43 @@ static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len); static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len); static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len); static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, u_char *eccbuf, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel); 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, u_char * oob_buf, static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, u_char * 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, u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode); static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, u_char *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); static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state); /** * nand_release_device - [GENERIC] release chip Loading Loading @@ -424,14 +439,16 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) page = (int)ofs; if (this->options & NAND_BUSWIDTH_16) { this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask); this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask); bad = cpu_to_le16(this->read_word(mtd)); if (this->badblockpos & 0x1) bad >>= 8; if ((bad & 0xFF) != 0xff) res = 1; } else { this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask); this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask); if (this->read_byte(mtd) != 0xff) res = 1; } Loading Loading @@ -498,7 +515,8 @@ static int nand_check_wp(struct mtd_info *mtd) * Check, if the block is bad. Either by reading the bad block table or * calling of the scan function. */ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) { struct nand_chip *this = mtd->priv; Loading Loading @@ -540,7 +558,8 @@ static void nand_wait_ready(struct mtd_info *mtd) * Send command to NAND device. This function is used for small page * devices (256/512 Bytes per page) */ static void nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) static void nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) { register struct nand_chip *this = mtd->priv; Loading Loading @@ -755,7 +774,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, * * 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) static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) { spinlock_t *lock = &this->controller->lock; wait_queue_head_t *wq = &this->controller->wq; Loading Loading @@ -2293,8 +2313,8 @@ static void nand_resume(struct mtd_info *mtd) if (this->state == FL_PM_SUSPENDED) nand_release_device(mtd); else printk(KERN_ERR "resume() called for the chip which is not in suspended state\n"); printk(KERN_ERR "nand_resume() called for a chip which is not " "in suspended state\n"); } /* Loading include/linux/mtd/nand.h +34 −69 Original line number Diff line number Diff line Loading @@ -15,43 +15,7 @@ * Contains standard defines and IDs for NAND flash devices * * Changelog: * 01-31-2000 DMW Created * 09-18-2000 SJH Moved structure out of the Disk-On-Chip drivers * so it can be used by other NAND flash device * drivers. I also changed the copyright since none * of the original contents of this file are specific * to DoC devices. David can whack me with a baseball * bat later if I did something naughty. * 10-11-2000 SJH Added private NAND flash structure for driver * 10-24-2000 SJH Added prototype for 'nand_scan' function * 10-29-2001 TG changed nand_chip structure to support * hardwarespecific function for accessing control lines * 02-21-2002 TG added support for different read/write adress and * ready/busy line access function * 02-26-2002 TG added chip_delay to nand_chip structure to optimize * command delay times for different chips * 04-28-2002 TG OOB config defines moved from nand.c to avoid duplicate * defines in jffs2/wbuf.c * 08-07-2002 TG forced bad block location to byte 5 of OOB, even if * CONFIG_MTD_NAND_ECC_JFFS2 is not set * 08-10-2002 TG extensions to nand_chip structure to support HW-ECC * * 08-29-2002 tglx nand_chip structure: data_poi for selecting * internal / fs-driver buffer * support for 6byte/512byte hardware ECC * read_ecc, write_ecc extended for different oob-layout * oob layout selections: NAND_NONE_OOB, NAND_JFFS2_OOB, * NAND_YAFFS_OOB * 11-25-2002 tglx Added Manufacturer code FUJITSU, NATIONAL * Split manufacturer and device ID structures * * 02-08-2004 tglx added option field to nand structure for chip anomalities * 05-25-2004 tglx added bad block table support, ST-MICRO manufacturer id * update of nand_chip structure description * 01-17-2005 dmarlin added extended commands for AG-AND device and added option * for BBT_AUTO_REFRESH. * 01-20-2005 dmarlin added optional pointer to hardware specific callback for * extra error status checks. * See git changelog. */ #ifndef __LINUX_MTD_NAND_H #define __LINUX_MTD_NAND_H Loading @@ -68,7 +32,8 @@ extern int nand_scan (struct mtd_info *mtd, int max_chips); extern void nand_release (struct mtd_info *mtd); /* Read raw data from the device without ECC */ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen); extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen); /* The maximum number of NAND chips in an array */ Loading Loading
drivers/mtd/nand/nand_base.c +62 −42 Original line number Diff line number Diff line Loading @@ -25,26 +25,30 @@ * 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. * 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 * Loading Loading @@ -132,32 +136,43 @@ static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len); static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len); static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len); static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, u_char *eccbuf, size_t *retlen, const u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel); static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, u_char *eccbuf, struct nand_oobinfo *oobsel); 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, u_char * oob_buf, static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int page, u_char * 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, u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode); static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, u_char *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); static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state); /** * nand_release_device - [GENERIC] release chip Loading Loading @@ -424,14 +439,16 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) page = (int)ofs; if (this->options & NAND_BUSWIDTH_16) { this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask); this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask); bad = cpu_to_le16(this->read_word(mtd)); if (this->badblockpos & 0x1) bad >>= 8; if ((bad & 0xFF) != 0xff) res = 1; } else { this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask); this->cmdfunc(mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask); if (this->read_byte(mtd) != 0xff) res = 1; } Loading Loading @@ -498,7 +515,8 @@ static int nand_check_wp(struct mtd_info *mtd) * Check, if the block is bad. Either by reading the bad block table or * calling of the scan function. */ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) { struct nand_chip *this = mtd->priv; Loading Loading @@ -540,7 +558,8 @@ static void nand_wait_ready(struct mtd_info *mtd) * Send command to NAND device. This function is used for small page * devices (256/512 Bytes per page) */ static void nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) static void nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) { register struct nand_chip *this = mtd->priv; Loading Loading @@ -755,7 +774,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, * * 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) static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state) { spinlock_t *lock = &this->controller->lock; wait_queue_head_t *wq = &this->controller->wq; Loading Loading @@ -2293,8 +2313,8 @@ static void nand_resume(struct mtd_info *mtd) if (this->state == FL_PM_SUSPENDED) nand_release_device(mtd); else printk(KERN_ERR "resume() called for the chip which is not in suspended state\n"); printk(KERN_ERR "nand_resume() called for a chip which is not " "in suspended state\n"); } /* Loading
include/linux/mtd/nand.h +34 −69 Original line number Diff line number Diff line Loading @@ -15,43 +15,7 @@ * Contains standard defines and IDs for NAND flash devices * * Changelog: * 01-31-2000 DMW Created * 09-18-2000 SJH Moved structure out of the Disk-On-Chip drivers * so it can be used by other NAND flash device * drivers. I also changed the copyright since none * of the original contents of this file are specific * to DoC devices. David can whack me with a baseball * bat later if I did something naughty. * 10-11-2000 SJH Added private NAND flash structure for driver * 10-24-2000 SJH Added prototype for 'nand_scan' function * 10-29-2001 TG changed nand_chip structure to support * hardwarespecific function for accessing control lines * 02-21-2002 TG added support for different read/write adress and * ready/busy line access function * 02-26-2002 TG added chip_delay to nand_chip structure to optimize * command delay times for different chips * 04-28-2002 TG OOB config defines moved from nand.c to avoid duplicate * defines in jffs2/wbuf.c * 08-07-2002 TG forced bad block location to byte 5 of OOB, even if * CONFIG_MTD_NAND_ECC_JFFS2 is not set * 08-10-2002 TG extensions to nand_chip structure to support HW-ECC * * 08-29-2002 tglx nand_chip structure: data_poi for selecting * internal / fs-driver buffer * support for 6byte/512byte hardware ECC * read_ecc, write_ecc extended for different oob-layout * oob layout selections: NAND_NONE_OOB, NAND_JFFS2_OOB, * NAND_YAFFS_OOB * 11-25-2002 tglx Added Manufacturer code FUJITSU, NATIONAL * Split manufacturer and device ID structures * * 02-08-2004 tglx added option field to nand structure for chip anomalities * 05-25-2004 tglx added bad block table support, ST-MICRO manufacturer id * update of nand_chip structure description * 01-17-2005 dmarlin added extended commands for AG-AND device and added option * for BBT_AUTO_REFRESH. * 01-20-2005 dmarlin added optional pointer to hardware specific callback for * extra error status checks. * See git changelog. */ #ifndef __LINUX_MTD_NAND_H #define __LINUX_MTD_NAND_H Loading @@ -68,7 +32,8 @@ extern int nand_scan (struct mtd_info *mtd, int max_chips); extern void nand_release (struct mtd_info *mtd); /* Read raw data from the device without ECC */ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen); extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, size_t ooblen); /* The maximum number of NAND chips in an array */ Loading
Thomas Gleixner <tglx@linutronix.de>Thomas Gleixner <tglx@linutronix.de>