diff options
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 774 |
1 files changed, 404 insertions, 370 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index cd90a46bf56a..778535006c83 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); |