diff options
| -rw-r--r-- | drivers/mtd/nand/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/mtd/nand/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/ams-delta.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/au1550nd.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/autcpu12.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/cs553x_nand.c | 12 | ||||
| -rw-r--r-- | drivers/mtd/nand/diskonchip.c | 10 | ||||
| -rw-r--r-- | drivers/mtd/nand/h1910.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 774 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_ecc.c | 222 | ||||
| -rw-r--r-- | drivers/mtd/nand/nandsim.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/ndfc.c | 319 | ||||
| -rw-r--r-- | drivers/mtd/nand/ppchameleonevb.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/nand/rtc_from4.c | 12 | ||||
| -rw-r--r-- | drivers/mtd/nand/s3c2410.c | 16 | ||||
| -rw-r--r-- | drivers/mtd/nand/sharpsl.c | 10 | ||||
| -rw-r--r-- | drivers/mtd/nand/toto.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/ts7250.c | 2 | ||||
| -rw-r--r-- | fs/jffs2/wbuf.c | 264 | ||||
| -rw-r--r-- | include/linux/mtd/nand.h | 220 | ||||
| -rw-r--r-- | include/linux/mtd/ndfc.h | 66 |
21 files changed, 1151 insertions, 807 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 2d0ebad..c2cb87f 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -23,6 +23,14 @@ config MTD_NAND_VERIFY_WRITE device thinks the write was successful, a bit could have been flipped accidentaly due to device wear or something else. +config MTD_NAND_ECC_SMC + bool "NAND ECC Smart Media byte order" + depends on MTD_NAND + default n + help + Software ECC according to the Smart Media Specification. + The original Linux implementation had byte 0 and 1 swapped. + config MTD_NAND_AUTCPU12 tristate "SmartMediaCard on autronix autcpu12 board" depends on MTD_NAND && ARCH_AUTCPU12 @@ -121,6 +129,12 @@ config MTD_NAND_S3C2410_HWECC currently not be able to switch to software, as there is no implementation for ECC method used by the S3C2410 +config MTD_NAND_NDFC + tristate "NDFC NanD Flash Controller" + depends on MTD_NAND && 44x + help + NDFC Nand Flash Controllers are integrated in EP44x SoCs + config MTD_NAND_DISKONCHIP tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)" depends on MTD_NAND && EXPERIMENTAL diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 3347508..f747593 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -21,5 +21,6 @@ obj-$(CONFIG_MTD_NAND_SHARPSL) += sharpsl.o obj-$(CONFIG_MTD_NAND_TS7250) += ts7250.o obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o obj-$(CONFIG_MTD_NAND_CS553X) += cs553x_nand.o +obj-$(CONFIG_MTD_NAND_NDFC) += ndfc.o nand-objs = nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c index 5a349eb..aeaf2de 100644 --- a/drivers/mtd/nand/ams-delta.c +++ b/drivers/mtd/nand/ams-delta.c @@ -192,7 +192,7 @@ static int __init ams_delta_init(void) } /* 25 us command delay time */ this->chip_delay = 30; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; /* Set chip enabled, but */ ams_delta_latch2_write(NAND_MASK, AMS_DELTA_LATCH2_NAND_NRE | diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c index 4253b93..29dde7d 100644 --- a/drivers/mtd/nand/au1550nd.c +++ b/drivers/mtd/nand/au1550nd.c @@ -578,7 +578,7 @@ static int __init au1xxx_nand_init(void) /* 30 us command delay time */ this->chip_delay = 30; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; this->options = NAND_NO_AUTOINCR; diff --git a/drivers/mtd/nand/autcpu12.c b/drivers/mtd/nand/autcpu12.c index 43b2960..dbb1b626 100644 --- a/drivers/mtd/nand/autcpu12.c +++ b/drivers/mtd/nand/autcpu12.c @@ -163,7 +163,7 @@ static int __init autcpu12_init(void) this->dev_ready = autcpu12_device_ready; /* 20 us command delay time */ this->chip_delay = 20; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; /* Enable the following for a flash based bad block table */ /* diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c index bf25125..064f3fe 100644 --- a/drivers/mtd/nand/cs553x_nand.c +++ b/drivers/mtd/nand/cs553x_nand.c @@ -242,11 +242,13 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr) this->chip_delay = 0; - this->eccmode = NAND_ECC_HW3_256; - this->enable_hwecc = cs_enable_hwecc; - this->calculate_ecc = cs_calculate_ecc; - this->correct_data = nand_correct_data; - + this->ecc.mode = NAND_ECC_HW; + this->ecc.size = 256; + this->ecc.bytes = 3; + this->ecc.hwctl = cs_enable_hwecc; + this->ecc.calculate = cs_calculate_ecc; + this->ecc.correct = nand_correct_data; + /* Enable the following for a flash based bad block table */ this->options = NAND_USE_FLASH_BBT | NAND_NO_AUTOINCR; diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index d160930..b771608 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -1674,12 +1674,14 @@ static int __init doc_probe(unsigned long physadr) nand->dev_ready = doc200x_dev_ready; nand->waitfunc = doc200x_wait; nand->block_bad = doc200x_block_bad; - nand->enable_hwecc = doc200x_enable_hwecc; - nand->calculate_ecc = doc200x_calculate_ecc; - nand->correct_data = doc200x_correct_data; + nand->ecc.hwctl = doc200x_enable_hwecc; + nand->ecc.calculate = doc200x_calculate_ecc; + nand->ecc.correct = doc200x_correct_data; nand->autooob = &doc200x_oobinfo; - nand->eccmode = NAND_ECC_HW6_512; + nand->ecc.mode = NAND_ECC_HW_SYNDROME; + nand->ecc.size = 512; + nand->ecc.bytes = 6; nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME; doc->physadr = physadr; diff --git a/drivers/mtd/nand/h1910.c b/drivers/mtd/nand/h1910.c index 9848eb0..06e91fa 100644 --- a/drivers/mtd/nand/h1910.c +++ b/drivers/mtd/nand/h1910.c @@ -149,7 +149,7 @@ static int __init h1910_init(void) this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */ /* 15 us command delay time */ this->chip_delay = 50; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; this->options = NAND_NO_AUTOINCR; /* Scan to find existence of the device */ diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index cd90a46..7785350 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -10,7 +10,7 @@ * 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 Thomas Gleixner (tglx@linutronix.de) * * 02-08-2004 tglx: support for strange chips, which cannot auto increment * pages on read / read_oob @@ -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 * @@ -72,6 +76,7 @@ #include <linux/module.h> #include <linux/delay.h> #include <linux/errno.h> +#include <linux/err.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/types.h> @@ -114,7 +119,7 @@ static struct nand_oobinfo nand_oob_64 = { }; /* This is used for padding purposes in nand_write_oob */ -static u_char ffchars[] = { +static uint8_t ffchars[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, @@ -128,36 +133,47 @@ static u_char ffchars[] = { /* * NAND low-level MTD interface functions */ -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 void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len); +static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len); +static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len); -static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); +static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, uint8_t *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, uint8_t *buf, uint8_t *eccbuf, + struct nand_oobinfo *oobsel); +static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, uint8_t *buf); +static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const uint8_t *buf); static int nand_write_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); + size_t *retlen, const uint8_t *buf, uint8_t *eccbuf, + struct nand_oobinfo *oobsel); +static int nand_write_oob(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const uint8_t *buf); +static int nand_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); + unsigned long count, loff_t to, size_t *retlen, + uint8_t *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, uint8_t * oob_buf, struct nand_oobinfo *oobsel, int mode); #ifdef CONFIG_MTD_NAND_VERIFY_WRITE -static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int page, int numpages, - 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, uint8_t *oob_buf, + struct nand_oobinfo *oobsel, int chipnr, + int oobmode); #else #define nand_verify_pages(...) (0) #endif -static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, int new_state); +static int nand_get_device(struct nand_chip *this, struct mtd_info *mtd, + int new_state); /** * nand_release_device - [GENERIC] release chip @@ -172,20 +188,12 @@ static void nand_release_device(struct mtd_info *mtd) /* De-select the NAND device */ this->select_chip(mtd, -1); - if (this->controller) { - /* 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); - } else { - /* Release the chip */ - spin_lock(&this->chip_lock); - this->state = FL_READY; - wake_up(&this->wq); - spin_unlock(&this->chip_lock); - } + /* 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); } /** @@ -194,7 +202,7 @@ static void nand_release_device(struct mtd_info *mtd) * * Default read function for 8bit buswith */ -static u_char nand_read_byte(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); @@ -207,7 +215,7 @@ static u_char nand_read_byte(struct mtd_info *mtd) * * Default write function for 8it buswith */ -static void nand_write_byte(struct mtd_info *mtd, u_char byte) +static void nand_write_byte(struct mtd_info *mtd, uint8_t byte) { struct nand_chip *this = mtd->priv; writeb(byte, this->IO_ADDR_W); @@ -220,10 +228,10 @@ static void nand_write_byte(struct mtd_info *mtd, u_char byte) * Default read function for 16bit buswith with * endianess conversion */ -static u_char nand_read_byte16(struct mtd_info *mtd) +static uint8_t nand_read_byte16(struct mtd_info *mtd) { struct nand_chip *this = mtd->priv; - return (u_char) cpu_to_le16(readw(this->IO_ADDR_R)); + return (uint8_t) cpu_to_le16(readw(this->IO_ADDR_R)); } /** @@ -234,7 +242,7 @@ static u_char nand_read_byte16(struct mtd_info *mtd) * Default write function for 16bit buswith with * endianess conversion */ -static void nand_write_byte16(struct mtd_info *mtd, u_char byte) +static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte) { struct nand_chip *this = mtd->priv; writew(le16_to_cpu((u16) byte), this->IO_ADDR_W); @@ -298,7 +306,7 @@ static void nand_select_chip(struct mtd_info *mtd, int chip) * * Default write function for 8bit buswith */ -static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) +static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { int i; struct nand_chip *this = mtd->priv; @@ -315,7 +323,7 @@ static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) * * Default read function for 8bit buswith */ -static void nand_read_buf(struct mtd_info *mtd, u_char *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; @@ -332,7 +340,7 @@ static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) * * Default verify function for 8bit buswith */ -static int nand_verify_buf(struct mtd_info *mtd, const u_char *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; @@ -352,7 +360,7 @@ static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) * * Default write function for 16bit buswith */ -static void nand_write_buf16(struct mtd_info *mtd, const u_char *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; @@ -372,7 +380,7 @@ static void nand_write_buf16(struct mtd_info *mtd, const u_char *buf, int len) * * Default read function for 16bit buswith */ -static void nand_read_buf16(struct mtd_info *mtd, u_char *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; @@ -391,7 +399,7 @@ static void nand_read_buf16(struct mtd_info *mtd, u_char *buf, int len) * * Default verify function for 16bit buswith */ -static int nand_verify_buf16(struct mtd_info *mtd, const u_char *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; @@ -432,14 +440,16 @@ 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; } @@ -463,7 +473,7 @@ 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; - u_char buf[2] = { 0, 0 }; + uint8_t buf[2] = { 0, 0 }; size_t retlen; int block; @@ -506,7 +516,8 @@ 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; @@ -548,7 +559,8 @@ 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; @@ -589,11 +601,11 @@ static void nand_command(struct mtd_info *mtd, unsigned command, int column, int this->write_byte(mtd, column); } if (page_addr != -1) { - this->write_byte(mtd, (unsigned char)(page_addr & 0xff)); - this->write_byte(mtd, (unsigned char)((page_addr >> 8) & 0xff)); + this->write_byte(mtd, (uint8_t)(page_addr & 0xff)); + this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff)); /* One more address cycle for devices > 32MiB */ if (this->chipsize > (32 << 20)) - this->write_byte(mtd, (unsigned char)((page_addr >> 16) & 0x0f)); + this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0x0f)); } /* Latch in address */ this->hwcontrol(mtd, NAND_CTL_CLRALE); @@ -681,11 +693,11 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, this->write_byte(mtd, column >> 8); } if (page_addr != -1) { - this->write_byte(mtd, (unsigned char)(page_addr & 0xff)); - this->write_byte(mtd, (unsigned char)((page_addr >> 8) & 0xff)); + this->write_byte(mtd, (uint8_t)(page_addr & 0xff)); + this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff)); /* One more address cycle for devices > 128MiB */ if (this->chipsize > (128 << 20)) - this->write_byte(mtd, (unsigned char)((page_addr >> 16) & 0xff)); + this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0xff)); } /* Latch in address */ this->hwcontrol(mtd, NAND_CTL_CLRALE); @@ -763,27 +775,21 @@ 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) { - struct nand_chip *active; - spinlock_t *lock; - wait_queue_head_t *wq; + spinlock_t *lock = &this->controller->lock; + wait_queue_head_t *wq = &this->controller->wq; DECLARE_WAITQUEUE(wait, current); - - lock = (this->controller) ? &this->controller->lock : &this->chip_lock; - wq = (this->controller) ? &this->controller->wq : &this->wq; retry: - active = this; spin_lock(lock); /* Hardware controller shared among independend devices */ - if (this->controller) { - if (this->controller->active) - active = this->controller->active; - else - this->controller->active = this; - } - if (active == this && this->state == FL_READY) { + /* Hardware controller shared among independend devices */ + if (!this->controller->active) + this->controller->active = this; + + if (this->controller->active == this && this->state == FL_READY) { this->state = new_state; spin_unlock(lock); return 0; @@ -869,13 +875,13 @@ 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, - u_char *oob_buf, struct nand_oobinfo *oobsel, int cached) + uint8_t *oob_buf, struct nand_oobinfo *oobsel, int cached) { int i, status; - u_char ecc_code[32]; - int eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; + uint8_t ecc_code[32]; + int eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; int *oob_config = oobsel->eccpos; - int datidx = 0, eccidx = 0, eccsteps = this->eccsteps; + int datidx = 0, eccidx = 0, eccsteps = this->ecc.steps; int eccbytes = 0; /* FIXME: Enable cached programming */ @@ -895,20 +901,20 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag /* Software ecc 3/256, write all */ case NAND_ECC_SOFT: for (; eccsteps; eccsteps--) { - this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); + this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); for (i = 0; i < 3; i++, eccidx++) oob_buf[oob_config[eccidx]] = ecc_code[i]; - datidx += this->eccsize; + datidx += this->ecc.size; } this->write_buf(mtd, this->data_poi, mtd->writesize); break; default: - eccbytes = this->eccbytes; + eccbytes = this->ecc.bytes; for (; eccsteps; eccsteps--) { /* enable hardware ecc logic for write */ - this->enable_hwecc(mtd, NAND_ECC_WRITE); - this->write_buf(mtd, &this->data_poi[datidx], this->eccsize); - this->calculate_ecc(mtd, &this->data_poi[datidx], ecc_code); + this->ecc.hwctl(mtd, NAND_ECC_WRITE); + this->write_buf(mtd, &this->data_poi[datidx], this->ecc.size); + this->ecc.calculate(mtd, &this->data_poi[datidx], ecc_code); for (i = 0; i < eccbytes; i++, eccidx++) oob_buf[oob_config[eccidx]] = ecc_code[i]; /* If the hardware ecc provides syndromes then @@ -916,7 +922,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag * the data bytes (words) */ if (this->options & NAND_HWECC_SYNDROME) this->write_buf(mtd, ecc_code, eccbytes); - datidx += this->eccsize; + datidx += this->ecc.size; } break; } @@ -957,7 +963,7 @@ 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 & this->pagemask) * @numpages: number of pages to verify * @oob_buf: out of band data buffer * @oobsel: out of band selecttion structre @@ -973,12 +979,12 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *this, int pag * 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, - u_char *oob_buf, struct nand_oobinfo *oobsel, int chipnr, int oobmode) + 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 hweccbytes; - u_char oobdata[64]; + uint8_t oobdata[64]; hweccbytes = (this->options & NAND_HWECC_SYNDROME) ? (oobsel->eccbytes / eccsteps) : 0; @@ -1073,7 +1079,7 @@ static int nand_verify_pages(struct mtd_info *mtd, struct nand_chip *this, int p * This function simply calls nand_do_read_ecc with oob buffer and oobsel = NULL * and flags = 0xff */ -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, uint8_t *buf) { return nand_do_read_ecc(mtd, from, len, retlen, buf, NULL, &mtd->oobinfo, 0xff); } @@ -1091,7 +1097,7 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retl * This function simply calls nand_do_read_ecc with flags = 0xff */ static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *oobsel) + size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel) { /* use userspace supplied oobinfo, if zero */ if (oobsel == NULL) @@ -1116,15 +1122,15 @@ static int nand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, * NAND read with ECC */ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *oobsel, int flags) + size_t *retlen, uint8_t *buf, uint8_t *oob_buf, struct nand_oobinfo *oobsel, int flags) { 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; - u_char *data_poi, *oob_data = oob_buf; - u_char ecc_calc[32]; - u_char ecc_code[32]; + 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; @@ -1149,7 +1155,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, if (oobsel->useecc == MTD_NANDECC_AUTOPLACE) oobsel = this->autooob; - eccmode = oobsel->useecc ? this->eccmode : NAND_ECC_NONE; + eccmode = oobsel->useecc ? this->ecc.mode : NAND_ECC_NONE; oob_config = oobsel->eccpos; /* Select the NAND device */ @@ -1164,8 +1170,8 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, col = from & (mtd->writesize - 1); end = mtd->writesize; - ecc = this->eccsize; - eccbytes = this->eccbytes; + ecc = this->ecc.size; + eccbytes = this->ecc.bytes; if ((eccmode == NAND_ECC_NONE) || (this->options & NAND_HWECC_SYNDROME)) compareecc = 0; @@ -1210,7 +1216,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, oobsel->useecc == MTD_NANDECC_AUTOPL_USR) oob_data = &this->data_buf[end]; - eccsteps = this->eccsteps; + eccsteps = this->ecc.steps; switch (eccmode) { case NAND_ECC_NONE:{ @@ -1228,12 +1234,12 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, case NAND_ECC_SOFT: /* Software ECC 3/256: Read in a page + oob data */ this->read_buf(mtd, data_poi, end); for (i = 0, datidx = 0; eccsteps; eccsteps--, i += 3, datidx += ecc) - this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); + this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); break; default: for (i = 0, datidx = 0; eccsteps; eccsteps--, i += eccbytes, datidx += ecc) { - this->enable_hwecc(mtd, NAND_ECC_READ); + this->ecc.hwctl(mtd, NAND_ECC_READ); this->read_buf(mtd, &data_poi[datidx], ecc); /* HW ecc with syndrome calculation must read the @@ -1241,19 +1247,19 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, if (!compareecc) { /* Some hw ecc generators need to know when the * syndrome is read from flash */ - this->enable_hwecc(mtd, NAND_ECC_READSYN); + this->ecc.hwctl(mtd, NAND_ECC_READSYN); this->read_buf(mtd, &oob_data[i], eccbytes); /* We calc error correction directly, it checks the hw * generator for an error, reads back the syndrome and * does the error correction on the fly */ - ecc_status = this->correct_data(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]); + ecc_status = this->ecc.correct(mtd, &data_poi[datidx], &oob_data[i], &ecc_code[i]); if ((ecc_status == -1) || (ecc_status > (flags && 0xff))) { DEBUG(MTD_DEBUG_LEVEL0, "nand_read_ecc: " "Failed ECC read, page 0x%08x on chip %d\n", page, chipnr); ecc_failed++; } } else { - this->calculate_ecc(mtd, &data_poi[datidx], &ecc_calc[i]); + this->ecc.calculate(mtd, &data_poi[datidx], &ecc_calc[i]); } } break; @@ -1271,8 +1277,8 @@ 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->eccsteps; i++, datidx += ecc) { - ecc_status = this->correct_data(mtd, &data_poi[datidx], &ecc_code[j], &ecc_calc[j]); + 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]); /* Get next chunk of ecc bytes */ j += eccbytes; @@ -1309,7 +1315,7 @@ 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->eccsteps * sizeof(int); + oob_data += this->ecc.steps * sizeof(int); default: oob_data += mtd->oobsize; } @@ -1378,7 +1384,7 @@ int nand_do_read_ecc(struct mtd_info *mtd, loff_t from, size_t len, * * NAND read out-of-band data from the spare area */ -static int nand_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) +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; @@ -1545,7 +1551,7 @@ int nand_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t from, size_t len, s * forces the 0xff fill before using the buffer again. * */ -static u_char *nand_prepare_oobbuf(struct mtd_info *mtd, u_char *fsbuf, struct nand_oobinfo *oobsel, +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; @@ -1594,7 +1600,7 @@ static u_char *nand_prepare_oobbuf(struct mtd_info *mtd, u_char *fsbuf, struct n * This function simply calls nand_write_ecc with oob buffer and oobsel = NULL * */ -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(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const uint8_t *buf) { return (nand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL)); } @@ -1612,13 +1618,13 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retle * NAND write with ECC */ 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, + size_t *retlen, const uint8_t *buf, uint8_t *eccbuf, struct nand_oobinfo *oobsel) { int startpage, page, ret = -EIO, oob = 0, written = 0, chipnr; int autoplace = 0, numpages, totalpages; struct nand_chip *this = mtd->priv; - u_char *oobbuf, *bufstart; + uint8_t *oobbuf, *bufstart; int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); DEBUG(MTD_DEBUG_LEVEL3, "nand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int)to, (int)len); @@ -1675,12 +1681,12 @@ static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, /* Calc number of pages we can write in one go */ numpages = min(ppblock - (startpage & (ppblock - 1)), totalpages); oobbuf = nand_prepare_oobbuf(mtd, eccbuf, oobsel, autoplace, numpages); - bufstart = (u_char *) buf; + bufstart = (uint8_t *) buf; /* Loop until all data is written */ while (written < len) { - this->data_poi = (u_char *) &buf[written]; + this->data_poi = (uint8_t *) &buf[written]; /* Write one page. If this is the last page to write * or the last page in this block, then use the * real pageprogram command, else select cached programming @@ -1759,7 +1765,7 @@ static int nand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len, * * NAND write out-of-band */ -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_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; @@ -1879,13 +1885,13 @@ static int nand_writev(struct mtd_info *mtd, const struct kvec *vecs, unsigned l * NAND write with iovec with ecc */ 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) + loff_t to, size_t *retlen, uint8_t *eccbuf, struct nand_oobinfo *oobsel) { int i, page, len, total_len, ret = -EIO, written = 0, chipnr; int oob, numpages, autoplace = 0, startpage; struct nand_chip *this = mtd->priv; int ppblock = (1 << (this->phys_erase_shift - this->page_shift)); - u_char *oobbuf, *bufstart; + uint8_t *oobbuf, *bufstart; /* Preset written len for early exit */ *retlen = 0; @@ -1954,7 +1960,7 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign /* Do not cross block boundaries */ numpages = min(ppblock - (startpage & (ppblock - 1)), numpages); oobbuf = nand_prepare_oobbuf(mtd, NULL, oobsel, autoplace, numpages); - bufstart = (u_char *) vecs->iov_base; + bufstart = (uint8_t *) vecs->iov_base; bufstart += len; this->data_poi = bufstart; oob = 0; @@ -1985,7 +1991,7 @@ static int nand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs, unsign int cnt = 0; while (cnt < mtd->writesize) { if (vecs->iov_base != NULL && vecs->iov_len) - this->data_buf[cnt++] = ((u_char *) vecs->iov_base)[len++]; + this->data_buf[cnt++] = ((uint8_t *) vecs->iov_base)[len++]; /* Check, if we have to switch to the next tuple */ if (len >= (int)vecs->iov_len) { vecs++; @@ -2308,46 +2314,70 @@ 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"); } -/* module_text_address() isn't exported, and it's mostly a pointless - test if this is a module _anyway_ -- they'd have to try _really_ hard - to call us from in-kernel code if the core NAND support is modular. */ -#ifdef MODULE -#define caller_is_module() (1) -#else -#define caller_is_module() module_text_address((unsigned long)__builtin_return_address(0)) -#endif +/* + * Free allocated data structures + */ +static void nand_free_kmem(struct nand_chip *this) +{ + /* Buffer allocated by nand_scan ? */ + if (this->options & NAND_OOBBUF_ALLOC) + kfree(this->oob_buf); + /* Buffer allocated by nand_scan ? */ + if (this->options & NAND_DATABUF_ALLOC) + kfree(this->data_buf); + /* Controller allocated by nand_scan ? */ + if (this->options & NAND_CONTROLLER_ALLOC) + kfree(this->controller); +} -/** - * nand_scan - [NAND Interface] Scan for the NAND device - * @mtd: MTD device structure - * @maxchips: Number of chips to scan for - * - * This fills out all the uninitialized function pointers - * with the defaults. - * The flash ID is read and the mtd/chip structures are - * filled with the appropriate values. Buffers are allocated if - * they are not provided by the board driver - * The mtd->owner field must be set to the module of the caller - * +/* + * Allocate buffers and data structures */ -int nand_scan(struct mtd_info *mtd, int maxchips) +static int nand_allocate_kmem(struct mtd_info *mtd, struct nand_chip *this) { - int i, nand_maf_id, nand_dev_id, busw, maf_id; - struct nand_chip *this = mtd->priv; + size_t len; - /* Many callers got this wrong, so check for it for a while... */ - if (!mtd->owner && caller_is_module()) { - printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); - BUG(); + if (!this->oob_buf) { + len = mtd->oobsize << + (this->phys_erase_shift - this->page_shift); + this->oob_buf = kmalloc(len, GFP_KERNEL); + if (!this->oob_buf) + goto outerr; + this->options |= NAND_OOBBUF_ALLOC; } - /* Get buswidth to select the correct functions */ - busw = this->options & NAND_BUSWIDTH_16; + if (!this->data_buf) { + len = mtd->writesize + mtd->oobsize; + this->data_buf = kmalloc(len, GFP_KERNEL); + if (!this->data_buf) + goto outerr; + this->options |= NAND_DATABUF_ALLOC; + } + + if (!this->controller) { + this->controller = kzalloc(sizeof(struct nand_hw_control), + GFP_KERNEL); + if (!this->controller) + goto outerr; + this->options |= NAND_CONTROLLER_ALLOC; + } + return 0; + + outerr: + printk(KERN_ERR "nand_scan(): Cannot allocate buffers\n"); + nand_free_kmem(this); + return -ENOMEM; +} +/* + * Set default functions + */ +static void nand_set_defaults(struct nand_chip *this, int busw) +{ /* check for proper chip_delay setup, set 20us if not */ if (!this->chip_delay) this->chip_delay = 20; @@ -2382,6 +2412,17 @@ int nand_scan(struct mtd_info *mtd, int maxchips) this->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; if (!this->scan_bbt) this->scan_bbt = nand_default_bbt; +} + +/* + * Get the flash and manufacturer id and lookup if the typ is supported + */ +static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, + struct nand_chip *this, + 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); @@ -2390,159 +2431,194 @@ int nand_scan(struct mtd_info *mtd, int maxchips) this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); /* Read manufacturer and device IDs */ - nand_maf_id = this->read_byte(mtd); - nand_dev_id = this->read_byte(mtd); + *maf_id = this->read_byte(mtd); + dev_id = this->read_byte(mtd); - /* Print and store flash device information */ + /* Lookup the flash id */ for (i = 0; nand_flash_ids[i].name != NULL; i++) { + if (dev_id == nand_flash_ids[i].id) { + type = &nand_flash_ids[i]; + break; + } + } - if (nand_dev_id != nand_flash_ids[i].id) - continue; - - if (!mtd->name) - mtd->name = nand_flash_ids[i].name; - this->chipsize = nand_flash_ids[i].chipsize << 20; - - /* New 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); - /* The 4th id byte is the important one */ - extid = this->read_byte(mtd); - /* Calc pagesize */ - mtd->writesize = 1024 << (extid & 0x3); - extid >>= 2; - /* Calc oobsize */ - mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9); - extid >>= 2; - /* Calc blocksize. Blocksize is multiples of 64KiB */ - mtd->erasesize = (64 * 1024) << (extid & 0x03); - extid >>= 2; - /* Get buswidth information */ - busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; + if (!type) + return ERR_PTR(-ENODEV); + + this->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); + /* The 4th id byte is the important one */ + extid = this->read_byte(mtd); + /* Calc pagesize */ + mtd->writesize = 1024 << (extid & 0x3); + extid >>= 2; + /* Calc oobsize */ + mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9); + extid >>= 2; + /* Calc blocksize. Blocksize is multiples of 64KiB */ + mtd->erasesize = (64 * 1024) << (extid & 0x03); + extid >>= 2; + /* Get buswidth information */ + busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; - } else { - /* Old devices have this data hardcoded in the - * device id table */ - mtd->erasesize = nand_flash_ids[i].erasesize; - mtd->writesize = nand_flash_ids[i].pagesize; - mtd->oobsize = mtd->writesize / 32; - busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; - } + } else { + /* + * Old devices have this data hardcoded in the device id table + */ + mtd->erasesize = nand_flash_ids[i].erasesize; + mtd->writesize = nand_flash_ids[i].pagesize; + mtd->oobsize = mtd->writesize / 32; + busw = nand_flash_ids[i].options & NAND_BUSWIDTH_16; + } - /* Try to identify manufacturer */ - for (maf_id = 0; nand_manuf_ids[maf_id].id != 0x0; maf_id++) { - if (nand_manuf_ids[maf_id].id == nand_maf_id) - break; - } + /* Try to identify manufacturer */ + for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_id++) { + if (nand_manuf_ids[maf_idx].id == *maf_id) + break; + } - /* Check, if buswidth is correct. Hardware drivers should set - * this correct ! */ - if (busw != (this->options & NAND_BUSWIDTH_16)) { - printk(KERN_INFO "NAND device: Manufacturer ID:" - " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id, - nand_manuf_ids[maf_id].name, mtd->name); - printk(KERN_WARNING - "NAND bus width %d instead %d bit\n", - (this->options & NAND_BUSWIDTH_16) ? 16 : 8, busw ? 16 : 8); - this->select_chip(mtd, -1); - return 1; - } + /* + * Check, if buswidth is correct. Hardware drivers should set + * this correct ! + */ + if (busw != (this->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, + busw ? 16 : 8); + return ERR_PTR(-EINVAL); + } - /* Calculate the address shift from the page size */ - this->page_shift = ffs(mtd->writesize) - 1; - this->bbt_erase_shift = this->phys_erase_shift = ffs(mtd->erasesize) - 1; - this->chip_shift = ffs(this->chipsize) - 1; - - /* Set the bad block position */ - this->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; - /* Set this as a default. Board drivers can override it, if necessary */ - this->options |= NAND_NO_AUTOINCR; - /* Check if this is a not a samsung device. Do not clear the options - * for chips which are not having an extended id. - */ - if (nand_maf_id != NAND_MFR_SAMSUNG && !nand_flash_ids[i].pagesize) - this->options &= ~NAND_SAMSUNG_LP_OPTIONS; + /* Calculate the address shift from the page size */ + this->page_shift = ffs(mtd->writesize) - 1; + /* Convert chipsize to number of pages per chip -1. */ + this->pagemask = (this->chipsize >> this->page_shift) - 1; - /* Check for AND chips with 4 page planes */ - if (this->options & NAND_4PAGE_ARRAY) - this->erase_cmd = multi_erase_cmd; - else - this->erase_cmd = single_erase_cmd; + this->bbt_erase_shift = this->phys_erase_shift = + ffs(mtd->erasesize) - 1; + this->chip_shift = ffs(this->chipsize) - 1; - /* Do not replace user supplied command function ! */ - if (mtd->writesize > 512 && this->cmdfunc == nand_command) - this->cmdfunc = nand_command_lp; + /* Set the bad block position */ + this->badblockpos = mtd->writesize > 512 ? + NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; - printk(KERN_INFO "NAND device: Manufacturer ID:" - " 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id, - nand_manuf_ids[maf_id].name, nand_flash_ids[i].name); - break; + /* Get chip options, preserve non chip based options */ + this->options &= ~NAND_CHIPOPTIONS_MSK; + this->options |= nand_flash_ids[i].options & NAND_CHIPOPTIONS_MSK; + + /* + * Set this as a default. Board drivers can override it, if necessary + */ + this->options |= NAND_NO_AUTOINCR; + + /* Check if this 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; + + /* Check for AND chips with 4 page planes */ + if (this->options & NAND_4PAGE_ARRAY) + this->erase_cmd = multi_erase_cmd; + else + this->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; + + 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, type->name); + + return type; +} + +/* module_text_address() isn't exported, and it's mostly a pointless + test if this is a module _anyway_ -- they'd have to try _really_ hard + to call us from in-kernel code if the core NAND support is modular. */ +#ifdef MODULE +#define caller_is_module() (1) +#else +#define caller_is_module() \ + module_text_address((unsigned long)__builtin_return_address(0)) +#endif + +/** + * nand_scan - [NAND Interface] Scan for the NAND device + * @mtd: MTD device structure + * @maxchips: Number of chips to scan for + * + * This fills out all the uninitialized function pointers + * with the defaults. + * The flash ID is read and the mtd/chip structures are + * filled with the appropriate values. Buffers are allocated if + * they are not provided by the board driver + * The mtd->owner field must be set to the module of the caller + * + */ +int nand_scan(struct mtd_info *mtd, int maxchips) +{ + int i, busw, nand_maf_id; + struct nand_chip *this = mtd->priv; + struct nand_flash_dev *type; + + /* Many callers got this wrong, so check for it for a while... */ + if (!mtd->owner && caller_is_module()) { + printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); + BUG(); } - if (!nand_flash_ids[i].name) { + /* Get buswidth to select the correct functions */ + busw = this->options & NAND_BUSWIDTH_16; + /* Set the default functions */ + nand_set_defaults(this, busw); + + /* Read the flash type */ + type = nand_get_flash_type(mtd, this, busw, &nand_maf_id); + + if (IS_ERR(type)) { printk(KERN_WARNING "No NAND device found!!!\n"); this->select_chip(mtd, -1); - return 1; + return PTR_ERR(type); } + /* Check for a chip array */ for (i = 1; i < maxchips; i++) { this->select_chip(mtd, i); - /* Send the command for reading device ID */ this->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); - /* Read manufacturer and device IDs */ if (nand_maf_id != this->read_byte(mtd) || - nand_dev_id != this->read_byte(mtd)) + type->id != this->read_byte(mtd)) break; } if (i > 1) printk(KERN_INFO "%d NAND chips detected\n", i); - /* Allocate buffers, if necessary */ - if (!this->oob_buf) { - size_t len; - len = mtd->oobsize << (this->phys_erase_shift - this->page_shift); - this->oob_buf = kmalloc(len, GFP_KERNEL); - if (!this->oob_buf) { - printk(KERN_ERR "nand_scan(): Cannot allocate oob_buf\n"); - return -ENOMEM; - } - this->options |= NAND_OOBBUF_ALLOC; - } - - if (!this->data_buf) { - size_t len; - len = mtd->writesize + mtd->oobsize; - this->data_buf = kmalloc(len, GFP_KERNEL); - if (!this->data_buf) { - if (this->options & NAND_OOBBUF_ALLOC) - kfree(this->oob_buf); - printk(KERN_ERR "nand_scan(): Cannot allocate data_buf\n"); - return -ENOMEM; - } - this->options |= NAND_DATABUF_ALLOC; - } - /* Store the number of chips and calc total size for mtd */ this->numchips = i; mtd->size = i * this->chipsize; - /* Convert chipsize to number of pages per chip -1. */ - this->pagemask = (this->chipsize >> this->page_shift) - 1; + + /* Allocate buffers and data structures */ + if (nand_allocate_kmem(mtd, this)) + return -ENOMEM; + /* Preset the internal oob buffer */ - memset(this->oob_buf, 0xff, mtd->oobsize << (this->phys_erase_shift - this->page_shift)); + memset(this->oob_buf, 0xff, + mtd->oobsize << (this->phys_erase_shift - this->page_shift)); - /* If no default placement scheme is given, select an - * appropriate one */ + /* + * If no default placement scheme is given, select an appropriate one + */ if (!this->autooob) { - /* Select the appropriate default oob placement scheme for - * placement agnostic filesystems */ switch (mtd->oobsize) { case 8: this->autooob = &nand_oob_8; @@ -2554,111 +2630,73 @@ int nand_scan(struct mtd_info *mtd, int maxchips) this->autooob = &nand_oob_64; break; default: - printk(KERN_WARNING "No oob scheme defined for oobsize %d\n", mtd->oobsize); + printk(KERN_WARNING "No oob scheme defined for " + "oobsize %d\n", mtd->oobsize); BUG(); } } - /* The number of bytes available for the filesystem to place fs dependend - * oob data */ + /* + * The number of bytes available for the filesystem to place fs + * dependend oob data + */ mtd->oobavail = 0; for (i = 0; this->autooob->oobfree[i][1]; i++) mtd->oobavail += this->autooob->oobfree[i][1]; /* - * check ECC mode, default to software - * if 3byte/512byte hardware ECC is selected and we have 256 byte pagesize - * fallback to software ECC + * check ECC mode, default to software if 3byte/512byte hardware ECC is + * selected and we have 256 byte pagesize fallback to software ECC */ - this->eccsize = 256; /* set default eccsize */ - this->eccbytes = 3; - - switch (this->eccmode) { - case NAND_ECC_HW12_2048: - if (mtd->writesize < 2048) { - printk(KERN_WARNING "2048 byte HW ECC not possible on %d byte page size, fallback to SW ECC\n", - mtd->writesize); - this->eccmode = NAND_ECC_SOFT; - this->calculate_ecc = nand_calculate_ecc; - this->correct_data = nand_correct_data; - } else - this->eccsize = 2048; - break; - - case NAND_ECC_HW3_512: - case NAND_ECC_HW6_512: - case NAND_ECC_HW8_512: - if (mtd->writesize == 256) { - printk(KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n"); - this->eccmode = NAND_ECC_SOFT; - this->calculate_ecc = nand_calculate_ecc; - this->correct_data = nand_correct_data; - } else - this->eccsize = 512; /* set eccsize to 512 */ - break; + switch (this->ecc.mode) { + case NAND_ECC_HW: + case NAND_ECC_HW_SYNDROME: + if (!this->ecc.calculate || !this->ecc.correct || + !this->ecc.hwctl) { + printk(KERN_WARNING "No ECC functions supplied, " + "Hardware ECC not possible\n"); + BUG(); + } + if (mtd->writesize >= this->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; - case NAND_ECC_HW3_256: + case NAND_ECC_SOFT: + this->ecc.calculate = nand_calculate_ecc; + this->ecc.correct = nand_correct_data; + this->ecc.size = 256; + this->ecc.bytes = 3; break; case NAND_ECC_NONE: - printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. This is not recommended !!\n"); - this->eccmode = NAND_ECC_NONE; - break; - - case NAND_ECC_SOFT: - this->calculate_ecc = nand_calculate_ecc; - this->correct_data = nand_correct_data; + printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " + "This is not recommended !!\n"); + this->ecc.size = mtd->writesize; + this->ecc.bytes = 0; break; - default: - printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", this->eccmode); + printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", + this->ecc.mode); BUG(); } - /* Check hardware ecc function availability and adjust number of ecc bytes per - * calculation step + /* + * Set the number of read / write steps for one page depending on ECC + * mode */ - switch (this->eccmode) { - case NAND_ECC_HW12_2048: - this->eccbytes += 4; - case NAND_ECC_HW8_512: - this->eccbytes += 2; - case NAND_ECC_HW6_512: - this->eccbytes += 3; - case NAND_ECC_HW3_512: - case NAND_ECC_HW3_256: - if (this->calculate_ecc && this->correct_data && this->enable_hwecc) - break; - printk(KERN_WARNING "No ECC functions supplied, Hardware ECC not possible\n"); + this->ecc.steps = mtd->writesize / this->ecc.size; + if(this->ecc.steps * this->ecc.size != mtd->writesize) { + printk(KERN_WARNING "Invalid ecc parameters\n"); BUG(); } - mtd->eccsize = this->eccsize; - - /* Set the number of read / write steps for one page to ensure ECC generation */ - switch (this->eccmode) { - case NAND_ECC_HW12_2048: - this->eccsteps = mtd->writesize / 2048; - break; - case NAND_ECC_HW3_512: - case NAND_ECC_HW6_512: - case NAND_ECC_HW8_512: - this->eccsteps = mtd->writesize / 512; - break; - case NAND_ECC_HW3_256: - case NAND_ECC_SOFT: - this->eccsteps = mtd->writesize / 256; - break; - - case NAND_ECC_NONE: - this->eccsteps = 1; - break; - } - /* Initialize state, waitqueue and spinlock */ this->state = FL_READY; - init_waitqueue_head(&this->wq); - spin_lock_init(&this->chip_lock); + init_waitqueue_head(&this->controller->wq); + spin_lock_init(&this->controller->lock); /* De-select the device */ this->select_chip(mtd, -1); @@ -2718,12 +2756,8 @@ void nand_release(struct mtd_info *mtd) /* Free bad block table memory */ kfree(this->bbt); - /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_OOBBUF_ALLOC) - kfree(this->oob_buf); - /* Buffer allocated by nand_scan ? */ - if (this->options & NAND_DATABUF_ALLOC) - kfree(this->data_buf); + /* Free buffers */ + nand_free_kmem(this); } EXPORT_SYMBOL_GPL(nand_scan); diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c index 1018929..2a163e4 100644 --- a/drivers/mtd/nand/nand_ecc.c +++ b/drivers/mtd/nand/nand_ecc.c @@ -7,6 +7,8 @@ * Copyright (C) 2000-2004 Steven J. Hill (sjhill@realitydiluted.com) * Toshiba America Electronics Components, Inc. * + * Copyright (C) 2006 Thomas Gleixner <tglx@linutronix.de> + * * $Id: nand_ecc.c,v 1.15 2005/11/07 11:14:30 gleixner Exp $ * * This file is free software; you can redistribute it and/or modify it @@ -63,87 +65,75 @@ static const u_char nand_ecc_precalc_table[] = { }; /** - * nand_trans_result - [GENERIC] create non-inverted ECC - * @reg2: line parity reg 2 - * @reg3: line parity reg 3 - * @ecc_code: ecc - * - * Creates non-inverted ECC code from line parity - */ -static void nand_trans_result(u_char reg2, u_char reg3, u_char *ecc_code) -{ - u_char a, b, i, tmp1, tmp2; - - /* Initialize variables */ - a = b = 0x80; - tmp1 = tmp2 = 0; - - /* Calculate first ECC byte */ - for (i = 0; i < 4; i++) { - if (reg3 & a) /* LP15,13,11,9 --> ecc_code[0] */ - tmp1 |= b; - b >>= 1; - if (reg2 & a) /* LP14,12,10,8 --> ecc_code[0] */ - tmp1 |= b; - b >>= 1; - a >>= 1; - } - - /* Calculate second ECC byte */ - b = 0x80; - for (i = 0; i < 4; i++) { - if (reg3 & a) /* LP7,5,3,1 --> ecc_code[1] */ - tmp2 |= b; - b >>= 1; - if (reg2 & a) /* LP6,4,2,0 --> ecc_code[1] */ - tmp2 |= b; - b >>= 1; - a >>= 1; - } - - /* Store two of the ECC bytes */ - ecc_code[0] = tmp1; - ecc_code[1] = tmp2; -} - -/** - * nand_calculate_ecc - [NAND Interface] Calculate 3 byte ECC code for 256 byte block + * nand_calculate_ecc - [NAND Interface] Calculate 3 byte ECC code + * for 256 byte block * @mtd: MTD block structure * @dat: raw data * @ecc_code: buffer for ECC */ -int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code) +int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, + u_char *ecc_code) { - u_char idx, reg1, reg2, reg3; - int j; + uint8_t idx, reg1, reg2, reg3, tmp1, tmp2; + int i; /* Initialize variables */ reg1 = reg2 = reg3 = 0; - ecc_code[0] = ecc_code[1] = ecc_code[2] = 0; /* Build up column parity */ - for (j = 0; j < 256; j++) { - + for(i = 0; i < 256; i++) { /* Get CP0 - CP5 from table */ - idx = nand_ecc_precalc_table[dat[j]]; + idx = nand_ecc_precalc_table[*dat++]; reg1 ^= (idx & 0x3f); /* All bit XOR = 1 ? */ if (idx & 0x40) { - reg3 ^= (u_char) j; - reg2 ^= ~((u_char) j); + reg3 ^= (uint8_t) i; + reg2 ^= ~((uint8_t) i); } } /* Create non-inverted ECC code from line parity */ - nand_trans_result(reg2, reg3, ecc_code); + tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */ + tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */ + tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */ + tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */ + tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */ + tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */ + tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */ + tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */ + + tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */ + tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */ + tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */ + tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */ + tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */ + tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */ + tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */ + tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */ /* Calculate final ECC code */ - ecc_code[0] = ~ecc_code[0]; - ecc_code[1] = ~ecc_code[1]; +#ifdef CONFIG_NAND_ECC_SMC + ecc_code[0] = ~tmp2; + ecc_code[1] = ~tmp1; +#else + ecc_code[0] = ~tmp1; + ecc_code[1] = ~tmp2; +#endif ecc_code[2] = ((~reg1) << 2) | 0x03; + return 0; } +EXPORT_SYMBOL(nand_calculate_ecc); + +static inline int countbits(uint32_t byte) +{ + int res = 0; + + for (;byte; byte >>= 1) + res += byte & 0x01; + return res; +} /** * nand_correct_data - [NAND Interface] Detect and correct bit error(s) @@ -154,90 +144,54 @@ int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code * * Detect and correct a 1 bit error for 256 byte block */ -int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) +int nand_correct_data(struct mtd_info *mtd, u_char *dat, + u_char *read_ecc, u_char *calc_ecc) { - u_char a, b, c, d1, d2, d3, add, bit, i; + uint8_t s0, s1, s2; + +#ifdef CONFIG_NAND_ECC_SMC + s0 = calc_ecc[0] ^ read_ecc[0]; + s1 = calc_ecc[1] ^ read_ecc[1]; + s2 = calc_ecc[2] ^ read_ecc[2]; +#else + s1 = calc_ecc[0] ^ read_ecc[0]; + s0 = calc_ecc[1] ^ read_ecc[1]; + s2 = calc_ecc[2] ^ read_ecc[2]; +#endif + if ((s0 | s1 | s2) == 0) + return 0; - /* Do error detection */ - d1 = calc_ecc[0] ^ read_ecc[0]; - d2 = calc_ecc[1] ^ read_ecc[1]; - d3 = calc_ecc[2] ^ read_ecc[2]; + /* Check for a single bit error */ + if( ((s0 ^ (s0 >> 1)) & 0x55) == 0x55 && + ((s1 ^ (s1 >> 1)) & 0x55) == 0x55 && + ((s2 ^ (s2 >> 1)) & 0x54) == 0x54) { - if ((d1 | d2 | d3) == 0) { - /* No errors */ - return 0; - } else { - a = (d1 ^ (d1 >> 1)) & 0x55; - b = (d2 ^ (d2 >> 1)) & 0x55; - c = (d3 ^ (d3 >> 1)) & 0x54; - - /* Found and will correct single bit error in the data */ - if ((a == 0x55) && (b == 0x55) && (c == 0x54)) { - c = 0x80; - add = 0; - a = 0x80; - for (i = 0; i < 4; i++) { - if (d1 & c) - add |= a; - c >>= 2; - a >>= 1; - } - c = 0x80; - for (i = 0; i < 4; i++) { - if (d2 & c) - add |= a; - c >>= 2; - a >>= 1; - } - bit = 0; - b = 0x04; - c = 0x80; - for (i = 0; i < 3; i++) { - if (d3 & c) - bit |= b; - c >>= 2; - b >>= 1; - } - b = 0x01; - a = dat[add]; - a ^= (b << bit); - dat[add] = a; - return 1; - } else { - i = 0; - while (d1) { - if (d1 & 0x01) - ++i; - d1 >>= 1; - } - while (d2) { - if (d2 & 0x01) - ++i; - d2 >>= 1; - } - while (d3) { - if (d3 & 0x01) - ++i; - d3 >>= 1; - } - if (i == 1) { - /* ECC Code Error Correction */ - read_ecc[0] = calc_ecc[0]; - read_ecc[1] = calc_ecc[1]; - read_ecc[2] = calc_ecc[2]; - return 2; - } else { - /* Uncorrectable Error */ - return -1; - } - } + uint32_t byteoffs, bitnum; + + byteoffs = (s1 << 0) & 0x80; + byteoffs |= (s1 << 1) & 0x40; + byteoffs |= (s1 << 2) & 0x20; + byteoffs |= (s1 << 3) & 0x10; + + byteoffs |= (s0 >> 4) & 0x08; + byteoffs |= (s0 >> 3) & 0x04; + byteoffs |= (s0 >> 2) & 0x02; + byteoffs |= (s0 >> 1) & 0x01; + + bitnum = (s2 >> 5) & 0x04; + bitnum |= (s2 >> 4) & 0x02; + bitnum |= (s2 >> 3) & 0x01; + + dat[byteoffs] ^= (1 << bitnum); + + return 1; } - /* Should never happen */ + if(countbits(s0 | ((uint32_t)s1 << 8) | ((uint32_t)s2 <<16)) == 1) + return 1; + return -1; } - -EXPORT_SYMBOL(nand_calculate_ecc); EXPORT_SYMBOL(nand_correct_data); MODULE_LICENSE("GPL"); diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index 8674f1e..22af9b2 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -1523,7 +1523,7 @@ static int __init ns_init_module(void) chip->verify_buf = ns_nand_verify_buf; chip->write_word = ns_nand_write_word; chip->read_word = ns_nand_read_word; - chip->eccmode = NAND_ECC_SOFT; + chip->ecc.mode = NAND_ECC_SOFT; chip->options |= NAND_SKIP_BBTSCAN; /* diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c new file mode 100644 index 0000000..e2dc81d --- /dev/null +++ b/drivers/mtd/nand/ndfc.c @@ -0,0 +1,319 @@ +/* + * drivers/mtd/ndfc.c + * + * Overview: + * Platform independend driver for NDFC (NanD Flash Controller) + * integrated into EP440 cores + * + * Author: Thomas Gleixner + * + * Copyright 2006 IBM + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ +#include <linux/module.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/nand_ecc.h> +#include <linux/mtd/partitions.h> +#include <linux/mtd/ndfc.h> +#include <linux/mtd/ubi.h> +#include <linux/mtd/mtd.h> +#include <linux/platform_device.h> + +#include <asm/io.h> +#include <asm/ibm44x.h> + +struct ndfc_nand_mtd { + struct mtd_info mtd; + struct nand_chip chip; + struct platform_nand_chip *pl_chip; +}; + +static struct ndfc_nand_mtd ndfc_mtd[NDFC_MAX_BANKS]; + +struct ndfc_controller { + void __iomem *ndfcbase; + struct nand_hw_control ndfc_control; + atomic_t childs_active; +}; + +static struct ndfc_controller ndfc_ctrl; + +static void ndfc_select_chip(struct mtd_info *mtd, int chip) +{ + uint32_t ccr; + struct ndfc_controller *ndfc = &ndfc_ctrl; + struct nand_chip *nandchip = mtd->priv; + struct ndfc_nand_mtd *nandmtd = nandchip->priv; + struct platform_nand_chip *pchip = nandmtd->pl_chip; + + ccr = __raw_readl(ndfc->ndfcbase + NDFC_CCR); + if (chip >= 0) { + ccr &= ~NDFC_CCR_BS_MASK; + ccr |= NDFC_CCR_BS(chip + pchip->chip_offset); + } else + ccr |= NDFC_CCR_RESET_CE; + writel(ccr, ndfc->ndfcbase + NDFC_CCR); +} + +static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + struct nand_chip *chip = mtd->priv; + + switch (cmd) { + case NAND_CTL_SETCLE: + chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_CMD; + break; + case NAND_CTL_SETALE: + chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_ALE; + break; + default: + chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_DATA; + break; + } +} + +static int ndfc_ready(struct mtd_info *mtd) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + + return __raw_readl(ndfc->ndfcbase + NDFC_STAT) & NDFC_STAT_IS_READY; +} + +static void ndfc_enable_hwecc(struct mtd_info *mtd, int mode) +{ + uint32_t ccr; + struct ndfc_controller *ndfc = &ndfc_ctrl; + + ccr = __raw_readl(ndfc->ndfcbase + NDFC_CCR); + ccr |= NDFC_CCR_RESET_ECC; + __raw_writel(ccr, ndfc->ndfcbase + NDFC_CCR); + wmb(); +} + +static int ndfc_calculate_ecc(struct mtd_info *mtd, + const u_char *dat, u_char *ecc_code) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + uint32_t ecc; + uint8_t *p = (uint8_t *)&ecc; + + wmb(); + ecc = __raw_readl(ndfc->ndfcbase + NDFC_ECC); + ecc_code[0] = p[1]; + ecc_code[1] = p[2]; + ecc_code[2] = p[3]; + + return 0; +} + +/* + * Speedups for buffer read/write/verify + * + * NDFC allows 32bit read/write of data. So we can speed up the buffer + * functions. No further checking, as nand_base will always read/write + * page aligned. + */ +static void ndfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + uint32_t *p = (uint32_t *) buf; + + for(;len > 0; len -= 4) + *p++ = __raw_readl(ndfc->ndfcbase + NDFC_DATA); +} + +static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + uint32_t *p = (uint32_t *) buf; + + for(;len > 0; len -= 4) + __raw_writel(*p++, ndfc->ndfcbase + NDFC_DATA); +} + +static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + uint32_t *p = (uint32_t *) buf; + + for(;len > 0; len -= 4) + if (*p++ != __raw_readl(ndfc->ndfcbase + NDFC_DATA)) + return -EFAULT; + return 0; +} + +/* + * Initialize chip structure + */ +static void ndfc_chip_init(struct ndfc_nand_mtd *mtd) +{ + struct ndfc_controller *ndfc = &ndfc_ctrl; + struct nand_chip *chip = &mtd->chip; + + chip->IO_ADDR_R = ndfc->ndfcbase + NDFC_DATA; + chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_DATA; + chip->hwcontrol = ndfc_hwcontrol; + chip->dev_ready = ndfc_ready; + chip->select_chip = ndfc_select_chip; + chip->chip_delay = 50; + chip->priv = mtd; + chip->options = mtd->pl_chip->options; + chip->controller = &ndfc->ndfc_control; + chip->read_buf = ndfc_read_buf; + chip->write_buf = ndfc_write_buf; + chip->verify_buf = ndfc_verify_buf; + chip->ecc.correct = nand_correct_data; + chip->ecc.hwctl = ndfc_enable_hwecc; + chip->ecc.calculate = ndfc_calculate_ecc; + chip->ecc.mode = NAND_ECC_HW; + chip->ecc.size = 256; + chip->ecc.bytes = 3; + chip->autooob = mtd->pl_chip->autooob; + mtd->mtd.priv = chip; + mtd->mtd.owner = THIS_MODULE; +} + +static int ndfc_chip_probe(struct platform_device *pdev) +{ + int rc; + struct platform_nand_chip *nc = pdev->dev.platform_data; + struct ndfc_chip_settings *settings = nc->priv; + struct ndfc_controller *ndfc = &ndfc_ctrl; + struct ndfc_nand_mtd *nandmtd; + + if (nc->chip_offset >= NDFC_MAX_BANKS || nc->nr_chips > NDFC_MAX_BANKS) + return -EINVAL; + + /* Set the bank settings */ + __raw_writel(settings->bank_settings, + ndfc->ndfcbase + NDFC_BCFG0 + (nc->chip_offset << 2)); + + nandmtd = &ndfc_mtd[pdev->id]; + if (nandmtd->pl_chip) + return -EBUSY; + + nandmtd->pl_chip = nc; + ndfc_chip_init(nandmtd); + + /* Scan for chips */ + if (nand_scan(&nandmtd->mtd, nc->nr_chips)) { + nandmtd->pl_chip = NULL; + return -ENODEV; + } + +#ifdef CONFIG_MTD_PARTITIONS + printk("Number of partitions %d\n", nc->nr_partitions); + if (nc->nr_partitions) { + struct mtd_info *mtd_ubi; + nc->partitions[NAND_PARTS_CONTENT_IDX].mtdp = &mtd_ubi; + + add_mtd_device(&nandmtd->mtd); /* for testing */ + add_mtd_partitions(&nandmtd->mtd, + nc->partitions, + nc->nr_partitions); + + add_mtd_device(mtd_ubi); + + } else +#else + add_mtd_device(&nandmtd->mtd); +#endif + + atomic_inc(&ndfc->childs_active); + return 0; +} + +static int ndfc_chip_remove(struct platform_device *pdev) +{ + return 0; +} + +static int ndfc_nand_probe(struct platform_device *pdev) +{ + struct platform_nand_ctrl *nc = pdev->dev.platform_data; + struct ndfc_controller_settings *settings = nc->priv; + struct resource *res = pdev->resource; + struct ndfc_controller *ndfc = &ndfc_ctrl; + unsigned long long phys = NDFC_PHYSADDR_OFFS | res->start; + + ndfc->ndfcbase = ioremap64(phys, res->end - res->start + 1); + if (!ndfc->ndfcbase) { + printk(KERN_ERR "NDFC: ioremap failed\n"); + return -EIO; + } + + __raw_writel(settings->ccr_settings, ndfc->ndfcbase + NDFC_CCR); + + spin_lock_init(&ndfc->ndfc_control.lock); + init_waitqueue_head(&ndfc->ndfc_control.wq); + + platform_set_drvdata(pdev, ndfc); + + printk("NDFC NAND Driver initialized. Chip-Rev: 0x%08x\n", + __raw_readl(ndfc->ndfcbase + NDFC_REVID)); + + return 0; +} + +static int ndfc_nand_remove(struct platform_device *pdev) +{ + struct ndfc_controller *ndfc = platform_get_drvdata(pdev); + + if (atomic_read(&ndfc->childs_active)) + return -EBUSY; + + if (ndfc) { + platform_set_drvdata(pdev, NULL); + iounmap(ndfc_ctrl.ndfcbase); + ndfc_ctrl.ndfcbase = NULL; + } + return 0; +} + +/* driver device registration */ + +static struct platform_driver ndfc_chip_driver = { + .probe = ndfc_chip_probe, + .remove = ndfc_chip_remove, + .driver = { + .name = "ndfc-chip", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver ndfc_nand_driver = { + .probe = ndfc_nand_probe, + .remove = ndfc_nand_remove, + .driver = { + .name = "ndfc-nand", + .owner = THIS_MODULE, + }, +}; + +static int __init ndfc_nand_init(void) +{ + int ret = platform_driver_register(&ndfc_nand_driver); + + if (!ret) + ret = platform_driver_register(&ndfc_chip_driver); + return ret; +} + +static void __exit ndfc_nand_exit(void) +{ + platform_driver_unregister(&ndfc_chip_driver); + platform_driver_unregister(&ndfc_nand_driver); +} + +module_init(ndfc_nand_init); +module_exit(ndfc_nand_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); +MODULE_DESCRIPTION("Platform driver for NDFC"); diff --git a/drivers/mtd/nand/ppchameleonevb.c b/drivers/mtd/nand/ppchameleonevb.c index 5d4d16f..9fab099 100644 --- a/drivers/mtd/nand/ppchameleonevb.c +++ b/drivers/mtd/nand/ppchameleonevb.c @@ -257,7 +257,7 @@ static int __init ppchameleonevb_init(void) #endif this->chip_delay = NAND_BIG_DELAY_US; /* ECC mode */ - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; /* Scan to find existence of the device (it could not be mounted) */ if (nand_scan(ppchameleon_mtd, 1)) { @@ -358,7 +358,7 @@ static int __init ppchameleonevb_init(void) this->chip_delay = NAND_SMALL_DELAY_US; /* ECC mode */ - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; /* Scan to find existence of the device */ if (nand_scan(ppchameleonevb_mtd, 1)) { diff --git a/drivers/mtd/nand/rtc_from4.c b/drivers/mtd/nand/rtc_from4.c index 64ccf4c..f8e631c 100644 --- a/drivers/mtd/nand/rtc_from4.c +++ b/drivers/mtd/nand/rtc_from4.c @@ -570,19 +570,21 @@ static int __init rtc_from4_init(void) #ifdef RTC_FROM4_HWECC printk(KERN_INFO "rtc_from4_init: using hardware ECC detection.\n"); - this->eccmode = NAND_ECC_HW8_512; + this->ecc.mode = NAND_ECC_HW_SYNDROME; + this->ecc.size = 512; + this->ecc.bytes = 8; this->options |= NAND_HWECC_SYNDROME; /* return the status of extra status and ECC checks */ this->errstat = rtc_from4_errstat; /* set the nand_oobinfo to support FPGA H/W error detection */ this->autooob = &rtc_from4_nand_oobinfo; - this->enable_hwecc = rtc_from4_enable_hwecc; - this->calculate_ecc = rtc_from4_calculate_ecc; - this->correct_data = rtc_from4_correct_data; + this->ecc.hwctl = rtc_from4_enable_hwecc; + this->ecc.calculate = rtc_from4_calculate_ecc; + this->ecc.correct = rtc_from4_correct_data; #else printk(KERN_INFO "rtc_from4_init: using software ECC detection.\n"); - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; #endif /* set the bad block tables to support debugging */ diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c index f800259..608340a 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -520,18 +520,20 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info, nmtd->set = set; if (hardware_ecc) { - chip->correct_data = s3c2410_nand_correct_data; - chip->enable_hwecc = s3c2410_nand_enable_hwecc; - chip->calculate_ecc = s3c2410_nand_calculate_ecc; - chip->eccmode = NAND_ECC_HW3_512; + chip->ecc.correct = s3c2410_nand_correct_data; + chip->ecc.hwctl = s3c2410_nand_enable_hwecc; + chip->ecc.calculate = s3c2410_nand_calculate_ecc; + chip->ecc.mode = NAND_ECC_HW; + chip->ecc.size = 512; + chip->ecc.bytes = 3; chip->autooob = &nand_hw_eccoob; if (info->is_s3c2440) { - chip->enable_hwecc = s3c2440_nand_enable_hwecc; - chip->calculate_ecc = s3c2440_nand_calculate_ecc; + chip->ecc.hwctl = s3c2440_nand_enable_hwecc; + chip->ecc.calculate = s3c2440_nand_calculate_ecc; } } else { - chip->eccmode = NAND_ECC_SOFT; + chip->ecc.mode = NAND_ECC_SOFT; } } diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c index 60e10c0..5554d0b 100644 --- a/drivers/mtd/nand/sharpsl.c +++ b/drivers/mtd/nand/sharpsl.c @@ -201,15 +201,17 @@ static int __init sharpsl_nand_init(void) /* 15 us command delay time */ this->chip_delay = 15; /* set eccmode using hardware ECC */ - this->eccmode = NAND_ECC_HW3_256; + this->ecc.mode = NAND_ECC_HW; + this->ecc.size = 256; + this->ecc.bytes = 3; this->badblock_pattern = &sharpsl_bbt; if (machine_is_akita() || machine_is_borzoi()) { this->badblock_pattern = &sharpsl_akita_bbt; this->autooob = &akita_oobinfo; } - this->enable_hwecc = sharpsl_nand_enable_hwecc; - this->calculate_ecc = sharpsl_nand_calculate_ecc; - this->correct_data = nand_correct_data; + this->ecc.hwctl = sharpsl_nand_enable_hwecc; + this->ecc.calculate = sharpsl_nand_calculate_ecc; + this->ecc.correct = nand_correct_data; /* Scan to find existence of the device */ err = nand_scan(sharpsl_mtd, 1); diff --git a/drivers/mtd/nand/toto.c b/drivers/mtd/nand/toto.c index c51c895..50aa6a4 100644 --- a/drivers/mtd/nand/toto.c +++ b/drivers/mtd/nand/toto.c @@ -146,7 +146,7 @@ static int __init toto_init(void) this->dev_ready = NULL; /* 25 us command delay time */ this->chip_delay = 30; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; /* Scan to find existance of the device */ if (nand_scan(toto_mtd, 1)) { diff --git a/drivers/mtd/nand/ts7250.c b/drivers/mtd/nand/ts7250.c index 622db31..70bce1b 100644 --- a/drivers/mtd/nand/ts7250.c +++ b/drivers/mtd/nand/ts7250.c @@ -155,7 +155,7 @@ static int __init ts7250_init(void) this->hwcontrol = ts7250_hwcontrol; this->dev_ready = ts7250_device_ready; this->chip_delay = 15; - this->eccmode = NAND_ECC_SOFT; + this->ecc.mode = NAND_ECC_SOFT; printk("Searching for NAND flash...\n"); /* Scan to find existence of the device */ diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index c7e3040..916c87d 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -613,20 +613,30 @@ int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c) return ret; } -int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino) + +static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf, + size_t len) +{ + if (len && !c->wbuf_len && (len >= c->wbuf_pagesize)) + return 0; + + if (len > (c->wbuf_pagesize - c->wbuf_len)) + len = c->wbuf_pagesize - c->wbuf_len; + memcpy(c->wbuf + c->wbuf_len, buf, len); + c->wbuf_len += (uint32_t) len; + return len; +} + +int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, + unsigned long count, loff_t to, size_t *retlen, + uint32_t ino) { - struct kvec outvecs[3]; - uint32_t totlen = 0; - uint32_t split_ofs = 0; - uint32_t old_totlen; - int ret, splitvec = -1; - int invec, outvec; - size_t wbuf_retlen; - unsigned char *wbuf_ptr; - size_t donelen = 0; + struct jffs2_eraseblock *jeb; + size_t wbuf_retlen, donelen = 0; uint32_t outvec_to = to; + int ret, invec; - /* If not NAND flash, don't bother */ + /* If not writebuffered flash, don't bother */ if (!jffs2_is_writebuffered(c)) return jffs2_flash_direct_writev(c, invecs, count, to, retlen); @@ -639,23 +649,22 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig memset(c->wbuf,0xff,c->wbuf_pagesize); } - /* Sanity checks on target address. - It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs), - and it's permitted to write at the beginning of a new - erase block. Anything else, and you die. - New block starts at xxx000c (0-b = block header) - */ + /* + * Sanity checks on target address. It's permitted to write + * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to + * write at the beginning of a new erase block. Anything else, + * and you die. New block starts at xxx000c (0-b = block + * header) + */ if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) { /* It's a write to a new block */ if (c->wbuf_len) { - D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs)); + D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx " + "causes flush of wbuf at 0x%08x\n", + (unsigned long)to, c->wbuf_ofs)); ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT); - if (ret) { - /* the underlying layer has to check wbuf_len to do the cleanup */ - D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret)); - *retlen = 0; - goto exit; - } + if (ret) + goto outerr; } /* set pointer to new block */ c->wbuf_ofs = PAGE_DIV(to); @@ -664,165 +673,70 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig if (to != PAD(c->wbuf_ofs + c->wbuf_len)) { /* We're not writing immediately after the writebuffer. Bad. */ - printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write to %08lx\n", (unsigned long)to); + printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write " + "to %08lx\n", (unsigned long)to); if (c->wbuf_len) printk(KERN_CRIT "wbuf was previously %08x-%08x\n", - c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); - BUG(); - } - - /* Note outvecs[3] above. We know count is never greater than 2 */ - if (count > 2) { - printk(KERN_CRIT "jffs2_flash_writev(): count is %ld\n", count); + c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len); BUG(); } - invec = 0; - outvec = 0; - - /* Fill writebuffer first, if already in use */ - if (c->wbuf_len) { - uint32_t invec_ofs = 0; - - /* adjust alignment offset */ - if (c->wbuf_len != PAGE_MOD(to)) { - c->wbuf_len = PAGE_MOD(to); - /* take care of alignment to next page */ - if (!c->wbuf_len) - c->wbuf_len = c->wbuf_pagesize; - } - - while(c->wbuf_len < c->wbuf_pagesize) { - uint32_t thislen; - - if (invec == count) - goto alldone; - - thislen = c->wbuf_pagesize - c->wbuf_len; - - if (thislen >= invecs[invec].iov_len) - thislen = invecs[invec].iov_len; - - invec_ofs = thislen; - - memcpy(c->wbuf + c->wbuf_len, invecs[invec].iov_base, thislen); - c->wbuf_len += thislen; - donelen += thislen; - /* Get next invec, if actual did not fill the buffer */ - if (c->wbuf_len < c->wbuf_pagesize) - invec++; - } - - /* write buffer is full, flush buffer */ - ret = __jffs2_flush_wbuf(c, NOPAD); - if (ret) { - /* the underlying layer has to check wbuf_len to do the cleanup */ - D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret)); - /* Retlen zero to make sure our caller doesn't mark the space dirty. - We've already done everything that's necessary */ - *retlen = 0; - goto exit; - } - outvec_to += donelen; - c->wbuf_ofs = outvec_to; - - /* All invecs done ? */ - if (invec == count) - goto alldone; - - /* Set up the first outvec, containing the remainder of the - invec we partially used */ - if (invecs[invec].iov_len > invec_ofs) { - outvecs[0].iov_base = invecs[invec].iov_base+invec_ofs; - totlen = outvecs[0].iov_len = invecs[invec].iov_len-invec_ofs; - if (totlen > c->wbuf_pagesize) { - splitvec = outvec; - split_ofs = outvecs[0].iov_len - PAGE_MOD(totlen); - } - outvec++; - } - invec++; - } - - /* OK, now we've flushed the wbuf and the start of the bits - we have been asked to write, now to write the rest.... */ - - /* totlen holds the amount of data still to be written */ - old_totlen = totlen; - for ( ; invec < count; invec++,outvec++ ) { - outvecs[outvec].iov_base = invecs[invec].iov_base; - totlen += outvecs[outvec].iov_len = invecs[invec].iov_len; - if (PAGE_DIV(totlen) != PAGE_DIV(old_totlen)) { - splitvec = outvec; - split_ofs = outvecs[outvec].iov_len - PAGE_MOD(totlen); - old_totlen = totlen; + /* adjust alignment offset */ + if (c->wbuf_len != PAGE_MOD(to)) { + c->wbuf_len = PAGE_MOD(to); + /* take care of alignment to next page */ + if (!c->wbuf_len) { + c->wbuf_len = c->wbuf_pagesize; + ret = __jffs2_flush_wbuf(c, NOPAD); + if (ret) + goto outerr; } } - /* Now the outvecs array holds all the remaining data to write */ - /* Up to splitvec,split_ofs is to be written immediately. The rest - goes into the (now-empty) wbuf */ - - if (splitvec != -1) { - uint32_t remainder; - - remainder = outvecs[splitvec].iov_len - split_ofs; - outvecs[splitvec].iov_len = split_ofs; - - /* We did cross a page boundary, so we write some now */ - if (jffs2_cleanmarker_oob(c)) - ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo); - else - ret = jffs2_flash_direct_writev(c, outvecs, splitvec+1, outvec_to, &wbuf_retlen); - - if (ret < 0 || wbuf_retlen != PAGE_DIV(totlen)) { - /* At this point we have no problem, - c->wbuf is empty. However refile nextblock to avoid - writing again to same address. - */ - struct jffs2_eraseblock *jeb; - - spin_lock(&c->erase_completion_lock); + for (invec = 0; invec < count; invec++) { + int vlen = invecs[invec].iov_len; + uint8_t *v = invecs[invec].iov_base; - jeb = &c->blocks[outvec_to / c->sector_size]; - jffs2_block_refile(c, jeb, REFILE_ANYWAY); + wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); - *retlen = 0; - spin_unlock(&c->erase_completion_lock); - goto exit; + if (c->wbuf_len == c->wbuf_pagesize) { + ret = __jffs2_flush_wbuf(c, NOPAD); + if (ret) + goto outerr; } - + vlen -= wbuf_retlen; + outvec_to += wbuf_retlen; donelen += wbuf_retlen; - c->wbuf_ofs = PAGE_DIV(outvec_to) + PAGE_DIV(totlen); - - if (remainder) { - outvecs[splitvec].iov_base += split_ofs; - outvecs[splitvec].iov_len = remainder; - } else { - splitvec++; + v += wbuf_retlen; + + if (vlen >= c->wbuf_pagesize) { + ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen), + &wbuf_retlen, v); + if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen)) + goto outfile; + + vlen -= wbuf_retlen; + outvec_to += wbuf_retlen; + c->wbuf_ofs = outvec_to; + donelen += wbuf_retlen; + v += wbuf_retlen; } - } else { - splitvec = 0; - } - - /* Now splitvec points to the start of the bits we have to copy - into the wbuf */ - wbuf_ptr = c->wbuf; + wbuf_retlen = jffs2_fill_wbuf(c, v, vlen); + if (c->wbuf_len == c->wbuf_pagesize) { + ret = __jffs2_flush_wbuf(c, NOPAD); + if (ret) + goto outerr; + } - for ( ; splitvec < outvec; splitvec++) { - /* Don't copy the wbuf into itself */ - if (outvecs[splitvec].iov_base == c->wbuf) - continue; - memcpy(wbuf_ptr, outvecs[splitvec].iov_base, outvecs[splitvec].iov_len); - wbuf_ptr += outvecs[splitvec].iov_len; - donelen += outvecs[splitvec].iov_len; + outvec_to += wbuf_retlen; + donelen += wbuf_retlen; } - c->wbuf_len = wbuf_ptr - c->wbuf; - /* If there's a remainder in the wbuf and it's a non-GC write, - remember that the wbuf affects this ino */ -alldone: + /* + * If there's a remainder in the wbuf and it's a non-GC write, + * remember that the wbuf affects this ino + */ *retlen = donelen; if (jffs2_sum_active()) { @@ -835,8 +749,24 @@ alldone: jffs2_wbuf_dirties_inode(c, ino); ret = 0; + up_write(&c->wbuf_sem); + return ret; -exit: +outfile: + /* + * At this point we have no problem, c->wbuf is empty. However + * refile nextblock to avoid writing again to same address. + */ + + spin_lock(&c->erase_completion_lock); + + jeb = &c->blocks[outvec_to / c->sector_size]; + jffs2_block_refile(c, jeb, REFILE_ANYWAY); + + spin_unlock(&c->erase_completion_lock); + +outerr: + *retlen = 0; up_write(&c->wbuf_sem); return ret; } diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index da5e67b..4605258 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -11,47 +11,11 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * - * Info: - * Contains standard defines and IDs for NAND flash devices + * Info: + * 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. + * Changelog: + * See git changelog. */ #ifndef __LINUX_MTD_NAND_H #define __LINUX_MTD_NAND_H @@ -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 */ @@ -84,7 +49,7 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_ * Constants for hardware specific CLE/ALE/NCE function */ /* Select the chip by setting nCE to low */ -#define NAND_CTL_SETNCE 1 +#define NAND_CTL_SETNCE 1 /* Deselect the chip by setting nCE to high */ #define NAND_CTL_CLRNCE 2 /* Select the command latch by setting CLE to high */ @@ -148,21 +113,12 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_ /* * Constants for ECC_MODES */ - -/* No ECC. Usage is not recommended ! */ -#define NAND_ECC_NONE 0 -/* Software ECC 3 byte ECC per 256 Byte data */ -#define NAND_ECC_SOFT 1 -/* Hardware ECC 3 byte ECC per 256 Byte data */ -#define NAND_ECC_HW3_256 2 -/* Hardware ECC 3 byte ECC per 512 Byte data */ -#define NAND_ECC_HW3_512 3 -/* Hardware ECC 3 byte ECC per 512 Byte data */ -#define NAND_ECC_HW6_512 4 -/* Hardware ECC 8 byte ECC per 512 Byte data */ -#define NAND_ECC_HW8_512 6 -/* Hardware ECC 12 byte ECC per 2048 Byte data */ -#define NAND_ECC_HW12_2048 7 +typedef enum { + NAND_ECC_NONE, + NAND_ECC_SOFT, + NAND_ECC_HW, + NAND_ECC_HW_SYNDROME, +} nand_ecc_modes_t; /* * Constants for Hardware ECC @@ -227,6 +183,8 @@ extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from, size_ #define NAND_SKIP_BBTSCAN 0x00040000 /* Options set by nand scan */ +/* Nand scan has allocated controller struct */ +#define NAND_CONTROLLER_ALLOC 0x20000000 /* Nand scan has allocated oob_buf */ #define NAND_OOBBUF_ALLOC 0x40000000 /* Nand scan has allocated data_buf */ @@ -264,6 +222,31 @@ struct nand_hw_control { }; /** + * struct nand_ecc_ctrl - Control structure for ecc + * @mode: ecc mode + * @steps: number of ecc steps per page + * @size: data bytes per ecc step + * @bytes: ecc bytes per step + * @hwctl: function to control hardware ecc generator. Must only + * be provided if an hardware ECC is available + * @calculate: function for ecc calculation or readback from ecc hardware + * @correct: function for ecc correction, matching to ecc generator (sw/hw) + */ +struct nand_ecc_ctrl { + nand_ecc_modes_t mode; + int steps; + int size; + int bytes; + int (*hwctl)(struct mtd_info *mtd, int mode); + int (*calculate)(struct mtd_info *mtd, + const uint8_t *dat, + uint8_t *ecc_code); + int (*correct)(struct mtd_info *mtd, uint8_t *dat, + uint8_t *read_ecc, + uint8_t *calc_ecc); +}; + +/** * struct nand_chip - NAND Private Flash Chip Data * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the flash device * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the flash device @@ -283,20 +266,12 @@ struct nand_hw_control { * is read from the chip status register * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing commands to the chip * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on ready - * @calculate_ecc: [REPLACEABLE] function for ecc calculation or readback from ecc hardware - * @correct_data: [REPLACEABLE] function for ecc correction, matching to ecc generator (sw/hw) - * @enable_hwecc: [BOARDSPECIFIC] function to enable (reset) hardware ecc generator. Must only - * be provided if a hardware ECC is available + * @ecc: [BOARDSPECIFIC] ecc control ctructure * @erase_cmd: [INTERN] erase command write function, selectable due to AND support * @scan_bbt: [REPLACEABLE] function to scan bad block table - * @eccmode: [BOARDSPECIFIC] mode of ecc, see defines - * @eccsize: [INTERN] databytes used per ecc-calculation - * @eccbytes: [INTERN] number of ecc bytes per ecc-calculation step - * @eccsteps: [INTERN] number of ecc calculation steps per page * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transfering data from array to read regs (tR) - * @chip_lock: [INTERN] spinlock used to protect access to this structure and the chip * @wq: [INTERN] wait queue to sleep on if a NAND operation is in progress - * @state: [INTERN] the current state of the NAND device + * @state: [INTERN] the current state of the NAND device * @page_shift: [INTERN] number of address bits in a page (column address bits) * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry @@ -317,7 +292,8 @@ struct nand_hw_control { * @bbt_td: [REPLACEABLE] bad block table descriptor for flash lookup * @bbt_md: [REPLACEABLE] bad block table mirror descriptor * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial bad block scan - * @controller: [OPTIONAL] a pointer to a hardware controller structure which is shared among multiple independend devices + * @controller: [REPLACEABLE] a pointer to a hardware controller structure + * which is shared among multiple independend devices * @priv: [OPTIONAL] pointer to private chip date * @errstat: [OPTIONAL] hardware specific function to perform additional error status checks * (determine if errors are correctable) @@ -325,44 +301,37 @@ struct nand_hw_control { struct nand_chip { void __iomem *IO_ADDR_R; - void __iomem *IO_ADDR_W; + void __iomem *IO_ADDR_W; - u_char (*read_byte)(struct mtd_info *mtd); - void (*write_byte)(struct mtd_info *mtd, u_char byte); + uint8_t (*read_byte)(struct mtd_info *mtd); + void (*write_byte)(struct mtd_info *mtd, uint8_t byte); u16 (*read_word)(struct mtd_info *mtd); void (*write_word)(struct mtd_info *mtd, u16 word); - void (*write_buf)(struct mtd_info *mtd, const u_char *buf, int len); - void (*read_buf)(struct mtd_info *mtd, u_char *buf, int len); - int (*verify_buf)(struct mtd_info *mtd, const u_char *buf, int len); + void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); + void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); + int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); void (*select_chip)(struct mtd_info *mtd, int chip); int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip); int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); - void (*hwcontrol)(struct mtd_info *mtd, int cmd); - int (*dev_ready)(struct mtd_info *mtd); - void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr); - int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state); - int (*calculate_ecc)(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code); - int (*correct_data)(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc); - void (*enable_hwecc)(struct mtd_info *mtd, int mode); + void (*hwcontrol)(struct mtd_info *mtd, int cmd); + int (*dev_ready)(struct mtd_info *mtd); + void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr); + int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state); void (*erase_cmd)(struct mtd_info *mtd, int page); int (*scan_bbt)(struct mtd_info *mtd); - int eccmode; - int eccsize; - int eccbytes; - int eccsteps; - int chip_delay; - spinlock_t chip_lock; + struct nand_ecc_ctrl ecc; + int chip_delay; wait_queue_head_t wq; - nand_state_t state; - int page_shift; + nand_state_t state; + int page_shift; int phys_erase_shift; int bbt_erase_shift; int chip_shift; - u_char *data_buf; - u_char *oob_buf; + uint8_t *data_buf; + uint8_t *oob_buf; int oobdirty; - u_char *data_poi; + uint8_t *data_poi; unsigned int options; int badblockpos; int numchips; @@ -388,19 +357,19 @@ struct nand_chip { #define NAND_MFR_NATIONAL 0x8f #define NAND_MFR_RENESAS 0x07 #define NAND_MFR_STMICRO 0x20 -#define NAND_MFR_HYNIX 0xad +#define NAND_MFR_HYNIX 0xad /** * struct nand_flash_dev - NAND Flash Device ID Structure * - * @name: Identify the device type - * @id: device ID code - * @pagesize: Pagesize in bytes. Either 256 or 512 or 0 + * @name: Identify the device type + * @id: device ID code + * @pagesize: Pagesize in bytes. Either 256 or 512 or 0 * If the pagesize is 0, then the real pagesize * and the eraseize are determined from the * extended id bytes in the chip - * @erasesize: Size of an erase block in the flash device. - * @chipsize: Total chipsize in Mega Bytes + * @erasesize: Size of an erase block in the flash device. + * @chipsize: Total chipsize in Mega Bytes * @options: Bitfield to store chip relevant options */ struct nand_flash_dev { @@ -415,7 +384,7 @@ struct nand_flash_dev { /** * struct nand_manufacturers - NAND Flash Manufacturer ID Structure * @name: Manufacturer name - * @id: manufacturer ID code of device. + * @id: manufacturer ID code of device. */ struct nand_manufacturers { int id; @@ -455,7 +424,7 @@ struct nand_bbt_descr { int veroffs; uint8_t version[NAND_MAX_CHIPS]; int len; - int maxblocks; + int maxblocks; int reserved_block_code; uint8_t *pattern; }; @@ -500,8 +469,8 @@ extern int nand_default_bbt (struct mtd_info *mtd); extern int nand_isbad_bbt (struct mtd_info *mtd, loff_t offs, int allowbbt); extern int nand_erase_nand (struct mtd_info *mtd, struct erase_info *instr, int allowbbt); extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len, - size_t * retlen, u_char * buf, u_char * oob_buf, - struct nand_oobinfo *oobsel, int flags); + size_t * retlen, uint8_t * buf, uint8_t * oob_buf, + struct nand_oobinfo *oobsel, int flags); /* * Constants for oob configuration @@ -509,4 +478,51 @@ extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len, #define NAND_SMALL_BADBLOCK_POS 5 #define NAND_LARGE_BADBLOCK_POS 0 +/** + * struct platform_nand_chip - chip level device structure + * + * @nr_chips: max. number of chips to scan for + * @chip_offs: chip number offset + * @nr_partitions: number of partitions pointed to be partitoons (or zero) + * @partitions: mtd partition list + * @chip_delay: R/B delay value in us + * @options: Option flags, e.g. 16bit buswidth + * @priv: hardware controller specific settings + */ +struct platform_nand_chip { + int nr_chips; + int chip_offset; + int nr_partitions; + struct mtd_partition *partitions; + int chip_delay; + unsigned int options; + void *priv; +}; + +/** + * struct platform_nand_ctrl - controller level device structure + * + * @hwcontrol: platform specific hardware control structure + * @dev_ready: platform specific function to read ready/busy pin + * @select_chip: platform specific chip select function + * @priv_data: private data to transport driver specific settings + * + * All fields are optional and depend on the hardware driver requirements + */ +struct platform_nand_ctrl { + void (*hwcontrol)(struct mtd_info *mtd, int cmd); + int (*dev_ready)(struct mtd_info *mtd); + void (*select_chip)(struct mtd_info *mtd, int chip); + void *priv; +}; + +/* Some helpers to access the data structures */ +static inline +struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + + return chip->priv; +} + #endif /* __LINUX_MTD_NAND_H */ diff --git a/include/linux/mtd/ndfc.h b/include/linux/mtd/ndfc.h new file mode 100644 index 0000000..31d61f0 --- /dev/null +++ b/include/linux/mtd/ndfc.h @@ -0,0 +1,66 @@ +/* + * linux/include/linux/mtd/ndfc.h + * + * Copyright (c) 2006 Thomas Gleixner <tglx@linutronix.de> + * + * 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. + * + * Info: + * Contains defines, datastructures for ndfc nand controller + * + */ +#ifndef __LINUX_MTD_NDFC_H +#define __LINUX_MTD_NDFC_H + +/* NDFC Register definitions */ +#define NDFC_CMD 0x00 +#define NDFC_ALE 0x04 +#define NDFC_DATA 0x08 +#define NDFC_ECC 0x10 +#define NDFC_BCFG0 0x30 +#define NDFC_BCFG1 0x34 +#define NDFC_BCFG2 0x38 +#define NDFC_BCFG3 0x3c +#define NDFC_CCR 0x40 +#define NDFC_STAT 0x44 +#define NDFC_HWCTL 0x48 +#define NDFC_REVID 0x50 + +#define NDFC_STAT_IS_READY 0x01000000 + +#define NDFC_CCR_RESET_CE 0x80000000 /* CE Reset */ +#define NDFC_CCR_RESET_ECC 0x40000000 /* ECC Reset */ +#define NDFC_CCR_RIE 0x20000000 /* Interrupt Enable on Device Rdy */ +#define NDFC_CCR_REN 0x10000000 /* Enable wait for Rdy in LinearR */ +#define NDFC_CCR_ROMEN 0x08000000 /* Enable ROM In LinearR */ +#define NDFC_CCR_ARE 0x04000000 /* Auto-Read Enable */ +#define NDFC_CCR_BS(x) (((x) & 0x3) << 24) /* Select Bank on CE[x] */ +#define NDFC_CCR_BS_MASK 0x03000000 /* Select Bank */ +#define NDFC_CCR_ARAC0 0x00000000 /* 3 Addr, 1 Col 2 Row 512b page */ +#define NDFC_CCR_ARAC1 0x00001000 /* 4 Addr, 1 Col 3 Row 512b page */ +#define NDFC_CCR_ARAC2 0x00002000 /* 4 Addr, 2 Col 2 Row 2K page */ +#define NDFC_CCR_ARAC3 0x00003000 /* 5 Addr, 2 Col 3 Row 2K page */ +#define NDFC_CCR_ARAC_MASK 0x00003000 /* Auto-Read mode Addr Cycles */ +#define NDFC_CCR_RPG 0x0000C000 /* Auto-Read Page */ +#define NDFC_CCR_EBCC 0x00000004 /* EBC Configuration Completed */ +#define NDFC_CCR_DHC 0x00000002 /* Direct Hardware Control Enable */ + +#define NDFC_BxCFG_EN 0x80000000 /* Bank Enable */ +#define NDFC_BxCFG_CED 0x40000000 /* nCE Style */ +#define NDFC_BxCFG_SZ_MASK 0x08000000 /* Bank Size */ +#define NDFC_BxCFG_SZ_8BIT 0x00000000 /* 8bit */ +#define NDFC_BxCFG_SZ_16BIT 0x08000000 /* 16bit */ + +#define NDFC_MAX_BANKS 4 + +struct ndfc_controller_settings { + uint32_t ccr_settings; +}; + +struct ndfc_chip_settings { + uint32_t bank_settings; +}; + +#endif |
