diff options
Diffstat (limited to 'drivers/mtd/nand/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 1109 |
1 files changed, 558 insertions, 551 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index a46e9bb847b..3ed9c5e4d34 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -21,7 +21,7 @@ * TODO: * Enable cached programming for 2k page size chips * Check, if mtd->ecctype should be set to MTD_ECC_HW - * if we have HW ecc support. + * if we have HW ECC support. * The AG-AND chips have nice features for speed improvement, * which are not supported yet. Read / program 4 pages in one go. * BBT table is not serialized, has to be fixed @@ -113,21 +113,19 @@ static int check_offs_len(struct mtd_info *mtd, /* Start address must align on block boundary */ if (ofs & ((1 << chip->phys_erase_shift) - 1)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Unaligned address\n", __func__); + pr_debug("%s: unaligned address\n", __func__); ret = -EINVAL; } /* Length must align on block boundary */ if (len & ((1 << chip->phys_erase_shift) - 1)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Length not block aligned\n", - __func__); + pr_debug("%s: length not block aligned\n", __func__); ret = -EINVAL; } /* Do not allow past end of device */ if (ofs + len > mtd->size) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Past end of device\n", - __func__); + pr_debug("%s: past end of device\n", __func__); ret = -EINVAL; } @@ -136,9 +134,9 @@ static int check_offs_len(struct mtd_info *mtd, /** * nand_release_device - [GENERIC] release chip - * @mtd: MTD device structure + * @mtd: MTD device structure * - * Deselect, release chip lock and wake up anyone waiting on the device + * Deselect, release chip lock and wake up anyone waiting on the device. */ static void nand_release_device(struct mtd_info *mtd) { @@ -157,9 +155,9 @@ static void nand_release_device(struct mtd_info *mtd) /** * nand_read_byte - [DEFAULT] read one byte from the chip - * @mtd: MTD device structure + * @mtd: MTD device structure * - * Default read function for 8bit buswith + * Default read function for 8bit buswidth */ static uint8_t nand_read_byte(struct mtd_info *mtd) { @@ -169,10 +167,11 @@ static uint8_t nand_read_byte(struct mtd_info *mtd) /** * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip - * @mtd: MTD device structure + * nand_read_byte16 - [DEFAULT] read one byte endianness aware from the chip + * @mtd: MTD device structure + * + * Default read function for 16bit buswidth with endianness conversion. * - * Default read function for 16bit buswith with - * endianess conversion */ static uint8_t nand_read_byte16(struct mtd_info *mtd) { @@ -182,10 +181,9 @@ static uint8_t nand_read_byte16(struct mtd_info *mtd) /** * nand_read_word - [DEFAULT] read one word from the chip - * @mtd: MTD device structure + * @mtd: MTD device structure * - * Default read function for 16bit buswith without - * endianess conversion + * Default read function for 16bit buswidth without endianness conversion. */ static u16 nand_read_word(struct mtd_info *mtd) { @@ -195,8 +193,8 @@ static u16 nand_read_word(struct mtd_info *mtd) /** * nand_select_chip - [DEFAULT] control CE line - * @mtd: MTD device structure - * @chipnr: chipnumber to select, -1 for deselect + * @mtd: MTD device structure + * @chipnr: chipnumber to select, -1 for deselect * * Default select function for 1 chip devices. */ @@ -218,11 +216,11 @@ static void nand_select_chip(struct mtd_info *mtd, int chipnr) /** * nand_write_buf - [DEFAULT] write buffer to chip - * @mtd: MTD device structure - * @buf: data buffer - * @len: number of bytes to write + * @mtd: MTD device structure + * @buf: data buffer + * @len: number of bytes to write * - * Default write function for 8bit buswith + * Default write function for 8bit buswidth. */ static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { @@ -235,11 +233,11 @@ static void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) /** * nand_read_buf - [DEFAULT] read chip data into buffer - * @mtd: MTD device structure - * @buf: buffer to store date - * @len: number of bytes to read + * @mtd: MTD device structure + * @buf: buffer to store date + * @len: number of bytes to read * - * Default read function for 8bit buswith + * Default read function for 8bit buswidth. */ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) { @@ -252,11 +250,11 @@ static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) /** * nand_verify_buf - [DEFAULT] Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare + * @mtd: MTD device structure + * @buf: buffer containing the data to compare + * @len: number of bytes to compare * - * Default verify function for 8bit buswith + * Default verify function for 8bit buswidth. */ static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { @@ -271,11 +269,11 @@ static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) /** * nand_write_buf16 - [DEFAULT] write buffer to chip - * @mtd: MTD device structure - * @buf: data buffer - * @len: number of bytes to write + * @mtd: MTD device structure + * @buf: data buffer + * @len: number of bytes to write * - * Default write function for 16bit buswith + * Default write function for 16bit buswidth. */ static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) { @@ -291,11 +289,11 @@ static void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) /** * nand_read_buf16 - [DEFAULT] read chip data into buffer - * @mtd: MTD device structure - * @buf: buffer to store date - * @len: number of bytes to read + * @mtd: MTD device structure + * @buf: buffer to store date + * @len: number of bytes to read * - * Default read function for 16bit buswith + * Default read function for 16bit buswidth. */ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) { @@ -310,11 +308,11 @@ static void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) /** * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer - * @mtd: MTD device structure - * @buf: buffer containing the data to compare - * @len: number of bytes to compare + * @mtd: MTD device structure + * @buf: buffer containing the data to compare + * @len: number of bytes to compare * - * Default verify function for 16bit buswith + * Default verify function for 16bit buswidth. */ static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) { @@ -332,9 +330,9 @@ static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) /** * nand_block_bad - [DEFAULT] Read bad block marker from the chip - * @mtd: MTD device structure - * @ofs: offset from device start - * @getchip: 0, if the chip is already selected + * @mtd: MTD device structure + * @ofs: offset from device start + * @getchip: 0, if the chip is already selected * * Check, if the block is bad. */ @@ -344,7 +342,7 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) struct nand_chip *chip = mtd->priv; u16 bad; - if (chip->options & NAND_BBT_SCANLASTPAGE) + if (chip->bbt_options & NAND_BBT_SCANLASTPAGE) ofs += mtd->erasesize - mtd->writesize; page = (int)(ofs >> chip->page_shift) & chip->pagemask; @@ -384,11 +382,11 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) /** * nand_default_block_markbad - [DEFAULT] mark a block bad - * @mtd: MTD device structure - * @ofs: offset from device start + * @mtd: MTD device structure + * @ofs: offset from device start * - * This is the default implementation, which can be overridden by - * a hardware specific driver. + * This is the default implementation, which can be overridden by a hardware + * specific driver. */ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) { @@ -396,7 +394,7 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) uint8_t buf[2] = { 0, 0 }; int block, ret, i = 0; - if (chip->options & NAND_BBT_SCANLASTPAGE) + if (chip->bbt_options & NAND_BBT_SCANLASTPAGE) ofs += mtd->erasesize - mtd->writesize; /* Get block number */ @@ -404,33 +402,31 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) if (chip->bbt) chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); - /* Do we have a flash based bad block table ? */ - if (chip->options & NAND_USE_FLASH_BBT) + /* Do we have a flash based bad block table? */ + if (chip->bbt_options & NAND_BBT_USE_FLASH) ret = nand_update_bbt(mtd, ofs); else { + struct mtd_oob_ops ops; + nand_get_device(chip, mtd, FL_WRITING); - /* Write to first two pages and to byte 1 and 6 if necessary. - * If we write to more than one location, the first error - * encountered quits the procedure. We write two bytes per - * location, so we dont have to mess with 16 bit access. + /* + * Write to first two pages if necessary. If we write to more + * than one location, the first error encountered quits the + * procedure. We write two bytes per location, so we dont have + * to mess with 16 bit access. */ + ops.len = ops.ooblen = 2; + ops.datbuf = NULL; + ops.oobbuf = buf; + ops.ooboffs = chip->badblockpos & ~0x01; + ops.mode = MTD_OPS_PLACE_OOB; do { - chip->ops.len = chip->ops.ooblen = 2; - chip->ops.datbuf = NULL; - chip->ops.oobbuf = buf; - chip->ops.ooboffs = chip->badblockpos & ~0x01; - - ret = nand_do_write_oob(mtd, ofs, &chip->ops); + ret = nand_do_write_oob(mtd, ofs, &ops); - if (!ret && (chip->options & NAND_BBT_SCANBYTE1AND6)) { - chip->ops.ooboffs = NAND_SMALL_BADBLOCK_POS - & ~0x01; - ret = nand_do_write_oob(mtd, ofs, &chip->ops); - } i++; ofs += mtd->writesize; - } while (!ret && (chip->options & NAND_BBT_SCAN2NDPAGE) && + } while (!ret && (chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2); nand_release_device(mtd); @@ -443,16 +439,16 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) /** * nand_check_wp - [GENERIC] check if the chip is write protected - * @mtd: MTD device structure - * Check, if the device is write protected + * @mtd: MTD device structure * - * The function expects, that the device is already selected + * Check, if the device is write protected. The function expects, that the + * device is already selected. */ static int nand_check_wp(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; - /* broken xD cards report WP despite being writable */ + /* Broken xD cards report WP despite being writable */ if (chip->options & NAND_BROKEN_XD) return 0; @@ -463,10 +459,10 @@ static int nand_check_wp(struct mtd_info *mtd) /** * nand_block_checkbad - [GENERIC] Check if a block is marked bad - * @mtd: MTD device structure - * @ofs: offset from device start - * @getchip: 0, if the chip is already selected - * @allowbbt: 1, if its allowed to access the bbt area + * @mtd: MTD device structure + * @ofs: offset from device start + * @getchip: 0, if the chip is already selected + * @allowbbt: 1, if its allowed to access the bbt area * * Check, if the block is bad. Either by reading the bad block table or * calling of the scan function. @@ -485,8 +481,8 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, /** * panic_nand_wait_ready - [GENERIC] Wait for the ready pin after commands. - * @mtd: MTD device structure - * @timeo: Timeout + * @mtd: MTD device structure + * @timeo: Timeout * * Helper function for nand_wait_ready used when needing to wait in interrupt * context. @@ -505,10 +501,7 @@ static void panic_nand_wait_ready(struct mtd_info *mtd, unsigned long timeo) } } -/* - * Wait for the ready pin, after a command - * The timeout is catched later. - */ +/* Wait for the ready pin, after a command. The timeout is caught later. */ void nand_wait_ready(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; @@ -519,7 +512,7 @@ void nand_wait_ready(struct mtd_info *mtd) return panic_nand_wait_ready(mtd, 400); led_trigger_event(nand_led_trigger, LED_FULL); - /* wait until command is processed or timeout occures */ + /* Wait until command is processed or timeout occurs */ do { if (chip->dev_ready(mtd)) break; @@ -531,13 +524,13 @@ EXPORT_SYMBOL_GPL(nand_wait_ready); /** * nand_command - [DEFAULT] Send command to NAND device - * @mtd: MTD device structure - * @command: the command to be sent - * @column: the column address for this command, -1 if none - * @page_addr: the page address for this command, -1 if none + * @mtd: MTD device structure + * @command: the command to be sent + * @column: the column address for this command, -1 if none + * @page_addr: the page address for this command, -1 if none * - * Send command to NAND device. This function is used for small page - * devices (256/512 Bytes per page) + * 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 int command, int column, int page_addr) @@ -545,9 +538,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, register struct nand_chip *chip = mtd->priv; int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; - /* - * Write out the command to the device. - */ + /* Write out the command to the device */ if (command == NAND_CMD_SEQIN) { int readcmd; @@ -567,9 +558,7 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, } chip->cmd_ctrl(mtd, command, ctrl); - /* - * Address cycle, when necessary - */ + /* Address cycle, when necessary */ ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; /* Serially input address */ if (column != -1) { @@ -590,8 +579,8 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); /* - * program and erase have their own busy handlers - * status and sequential in needs no delay + * Program and erase have their own busy handlers status and sequential + * in needs no delay */ switch (command) { @@ -625,8 +614,10 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, return; } } - /* Apply this short delay always to ensure that we do wait tWB in - * any case on any machine. */ + /* + * Apply this short delay always to ensure that we do wait tWB in + * any case on any machine. + */ ndelay(100); nand_wait_ready(mtd); @@ -634,14 +625,14 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, /** * nand_command_lp - [DEFAULT] Send command to NAND large page device - * @mtd: MTD device structure - * @command: the command to be sent - * @column: the column address for this command, -1 if none - * @page_addr: the page address for this command, -1 if none + * @mtd: MTD device structure + * @command: the command to be sent + * @column: the column address for this command, -1 if none + * @page_addr: the page address for this command, -1 if none * * Send command to NAND device. This is the version for the new large page - * devices We dont have the separate regions as we have in the small page - * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. + * devices. We don't have the separate regions as we have in the small page + * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. */ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, int column, int page_addr) @@ -683,8 +674,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); /* - * program and erase have their own busy handlers - * status, sequential in, and deplete1 need no delay + * Program and erase have their own busy handlers status, sequential + * in, and deplete1 need no delay. */ switch (command) { @@ -698,14 +689,12 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, case NAND_CMD_DEPLETE1: return; - /* - * read error status commands require only a short delay - */ case NAND_CMD_STATUS_ERROR: case NAND_CMD_STATUS_ERROR0: case NAND_CMD_STATUS_ERROR1: case NAND_CMD_STATUS_ERROR2: case NAND_CMD_STATUS_ERROR3: + /* Read error status commands require only a short delay */ udelay(chip->chip_delay); return; @@ -739,7 +728,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, default: /* * If we don't have access to the busy pin, we apply the given - * command delay + * command delay. */ if (!chip->dev_ready) { udelay(chip->chip_delay); @@ -747,8 +736,10 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, } } - /* Apply this short delay always to ensure that we do wait tWB in - * any case on any machine. */ + /* + * Apply this short delay always to ensure that we do wait tWB in + * any case on any machine. + */ ndelay(100); nand_wait_ready(mtd); @@ -756,25 +747,25 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, /** * panic_nand_get_device - [GENERIC] Get chip for selected access - * @chip: the nand chip descriptor - * @mtd: MTD device structure - * @new_state: the state which is requested + * @chip: the nand chip descriptor + * @mtd: MTD device structure + * @new_state: the state which is requested * * Used when in panic, no locks are taken. */ static void panic_nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) { - /* Hardware controller shared among independend devices */ + /* Hardware controller shared among independent devices */ chip->controller->active = chip; chip->state = new_state; } /** * nand_get_device - [GENERIC] Get chip for selected access - * @chip: the nand chip descriptor - * @mtd: MTD device structure - * @new_state: the state which is requested + * @chip: the nand chip descriptor + * @mtd: MTD device structure + * @new_state: the state which is requested * * Get the device and lock it for exclusive access */ @@ -812,10 +803,10 @@ retry: } /** - * panic_nand_wait - [GENERIC] wait until the command is done - * @mtd: MTD device structure - * @chip: NAND chip structure - * @timeo: Timeout + * panic_nand_wait - [GENERIC] wait until the command is done + * @mtd: MTD device structure + * @chip: NAND chip structure + * @timeo: timeout * * Wait for command done. This is a helper function for nand_wait used when * we are in interrupt context. May happen when in panic and trying to write @@ -838,13 +829,13 @@ static void panic_nand_wait(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_wait - [DEFAULT] wait until the command is done - * @mtd: MTD device structure - * @chip: NAND chip structure + * nand_wait - [DEFAULT] wait until the command is done + * @mtd: MTD device structure + * @chip: NAND chip structure * - * Wait for command done. This applies to erase and program only - * Erase can take up to 400ms and program up to 20ms according to - * general NAND and SmartMedia specs + * Wait for command done. This applies to erase and program only. Erase can + * take up to 400ms and program up to 20ms according to general NAND and + * SmartMedia specs. */ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) { @@ -859,8 +850,10 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) led_trigger_event(nand_led_trigger, LED_FULL); - /* Apply this short delay always to ensure that we do wait tWB in - * any case on any machine. */ + /* + * Apply this short delay always to ensure that we do wait tWB in any + * case on any machine. + */ ndelay(100); if ((state == FL_ERASING) && (chip->options & NAND_IS_AND)) @@ -890,16 +883,15 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) /** * __nand_unlock - [REPLACEABLE] unlocks specified locked blocks - * * @mtd: mtd info * @ofs: offset to start unlock from * @len: length to unlock - * @invert: when = 0, unlock the range of blocks within the lower and - * upper boundary address - * when = 1, unlock the range of blocks outside the boundaries - * of the lower and upper boundary address + * @invert: when = 0, unlock the range of blocks within the lower and + * upper boundary address + * when = 1, unlock the range of blocks outside the boundaries + * of the lower and upper boundary address * - * return - unlock status + * Returs unlock status. */ static int __nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len, int invert) @@ -919,10 +911,9 @@ static int __nand_unlock(struct mtd_info *mtd, loff_t ofs, /* Call wait ready function */ status = chip->waitfunc(mtd, chip); - udelay(1000); /* See if device thinks it succeeded */ if (status & 0x01) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Error status = 0x%08x\n", + pr_debug("%s: error status = 0x%08x\n", __func__, status); ret = -EIO; } @@ -932,12 +923,11 @@ static int __nand_unlock(struct mtd_info *mtd, loff_t ofs, /** * nand_unlock - [REPLACEABLE] unlocks specified locked blocks - * * @mtd: mtd info * @ofs: offset to start unlock from * @len: length to unlock * - * return - unlock status + * Returns unlock status. */ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { @@ -945,7 +935,7 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) int chipnr; struct nand_chip *chip = mtd->priv; - DEBUG(MTD_DEBUG_LEVEL3, "%s: start = 0x%012llx, len = %llu\n", + pr_debug("%s: start = 0x%012llx, len = %llu\n", __func__, (unsigned long long)ofs, len); if (check_offs_len(mtd, ofs, len)) @@ -964,7 +954,7 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) /* Check, if it is write protected */ if (nand_check_wp(mtd)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Device is write protected!!!\n", + pr_debug("%s: device is write protected!\n", __func__); ret = -EIO; goto out; @@ -981,18 +971,16 @@ EXPORT_SYMBOL(nand_unlock); /** * nand_lock - [REPLACEABLE] locks all blocks present in the device - * * @mtd: mtd info * @ofs: offset to start unlock from * @len: length to unlock * - * return - lock status + * This feature is not supported in many NAND parts. 'Micron' NAND parts do + * have this feature, but it allows only to lock all blocks, not for specified + * range for block. Implementing 'lock' feature by making use of 'unlock', for + * now. * - * This feature is not supported in many NAND parts. 'Micron' NAND parts - * do have this feature, but it allows only to lock all blocks, not for - * specified range for block. - * - * Implementing 'lock' feature by making use of 'unlock', for now. + * Returns lock status. */ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { @@ -1000,7 +988,7 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) int chipnr, status, page; struct nand_chip *chip = mtd->priv; - DEBUG(MTD_DEBUG_LEVEL3, "%s: start = 0x%012llx, len = %llu\n", + pr_debug("%s: start = 0x%012llx, len = %llu\n", __func__, (unsigned long long)ofs, len); if (check_offs_len(mtd, ofs, len)) @@ -1015,7 +1003,7 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) /* Check, if it is write protected */ if (nand_check_wp(mtd)) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Device is write protected!!!\n", + pr_debug("%s: device is write protected!\n", __func__); status = MTD_ERASE_FAILED; ret = -EIO; @@ -1028,10 +1016,9 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) /* Call wait ready function */ status = chip->waitfunc(mtd, chip); - udelay(1000); /* See if device thinks it succeeded */ if (status & 0x01) { - DEBUG(MTD_DEBUG_LEVEL0, "%s: Error status = 0x%08x\n", + pr_debug("%s: error status = 0x%08x\n", __func__, status); ret = -EIO; goto out; @@ -1047,13 +1034,13 @@ out: EXPORT_SYMBOL(nand_lock); /** - * nand_read_page_raw - [Intern] read raw page data without ecc - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_raw - [INTERN] read raw page data without ecc + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read * - * Not for syndrome calculating ecc controllers, which use a special oob layout + * Not for syndrome calculating ECC controllers, which use a special oob layout. */ static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) @@ -1064,11 +1051,11 @@ static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_read_page_raw_syndrome - [Intern] read raw page data without ecc - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_raw_syndrome - [INTERN] read raw page data without ecc + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read * * We need a special oob layout and handling even when OOB isn't used. */ @@ -1107,11 +1094,11 @@ static int nand_read_page_raw_syndrome(struct mtd_info *mtd, } /** - * nand_read_page_swecc - [REPLACABLE] software ecc based page read function - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_swecc - [REPLACEABLE] software ECC based page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read */ static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) @@ -1148,12 +1135,12 @@ static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_read_subpage - [REPLACABLE] software ecc based sub-page read function - * @mtd: mtd info structure - * @chip: nand chip info structure - * @data_offs: offset of requested data within the page - * @readlen: data length - * @bufpoi: buffer to store read data + * nand_read_subpage - [REPLACEABLE] software ECC based sub-page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @data_offs: offset of requested data within the page + * @readlen: data length + * @bufpoi: buffer to store read data */ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint32_t data_offs, uint32_t readlen, uint8_t *bufpoi) @@ -1166,12 +1153,12 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, int busw = (chip->options & NAND_BUSWIDTH_16) ? 2 : 1; int index = 0; - /* Column address wihin the page aligned to ECC size (256bytes). */ + /* Column address within the page aligned to ECC size (256bytes) */ start_step = data_offs / chip->ecc.size; end_step = (data_offs + readlen - 1) / chip->ecc.size; num_steps = end_step - start_step + 1; - /* Data size aligned to ECC ecc.size*/ + /* Data size aligned to ECC ecc.size */ datafrag_len = num_steps * chip->ecc.size; eccfrag_len = num_steps * chip->ecc.bytes; @@ -1183,13 +1170,14 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, p = bufpoi + data_col_addr; chip->read_buf(mtd, p, datafrag_len); - /* Calculate ECC */ + /* Calculate ECC */ for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) chip->ecc.calculate(mtd, p, &chip->buffers->ecccalc[i]); - /* The performance is faster if to position offsets - according to ecc.pos. Let make sure here that - there are no gaps in ecc positions */ + /* + * The performance is faster if we position offsets according to + * ecc.pos. Let's make sure that there are no gaps in ECC positions. + */ for (i = 0; i < eccfrag_len - 1; i++) { if (eccpos[i + start_step * chip->ecc.bytes] + 1 != eccpos[i + start_step * chip->ecc.bytes + 1]) { @@ -1201,8 +1189,10 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1); chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); } else { - /* send the command to read the particular ecc bytes */ - /* take care about buswidth alignment in read_buf */ + /* + * Send the command to read the particular ECC bytes take care + * about buswidth alignment in read_buf. + */ index = start_step * chip->ecc.bytes; aligned_pos = eccpos[index] & ~(busw - 1); @@ -1235,13 +1225,13 @@ static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_read_page_hwecc - [REPLACABLE] hardware ecc based page read function - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_hwecc - [REPLACEABLE] hardware ECC based page read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read * - * Not for syndrome calculating ecc controllers which need a special oob layout + * Not for syndrome calculating ECC controllers which need a special oob layout. */ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) @@ -1280,18 +1270,17 @@ static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_read_page_hwecc_oob_first - [REPLACABLE] hw ecc, read oob first - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_hwecc_oob_first - [REPLACEABLE] hw ecc, read oob first + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read * - * Hardware ECC for large page chips, require OOB to be read first. - * For this ECC mode, the write_page method is re-used from ECC_HW. - * These methods read/write ECC from the OOB area, unlike the - * ECC_HW_SYNDROME support with multiple ECC steps, follows the - * "infix ECC" scheme and reads/writes ECC from the data area, by - * overwriting the NAND manufacturer bad block markings. + * Hardware ECC for large page chips, require OOB to be read first. For this + * ECC mode, the write_page method is re-used from ECC_HW. These methods + * read/write ECC from the OOB area, unlike the ECC_HW_SYNDROME support with + * multiple ECC steps, follows the "infix ECC" scheme and reads/writes ECC from + * the data area, by overwriting the NAND manufacturer bad block markings. */ static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) @@ -1329,14 +1318,14 @@ static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd, } /** - * nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read - * @mtd: mtd info structure - * @chip: nand chip info structure - * @buf: buffer to store read data - * @page: page number to read + * nand_read_page_syndrome - [REPLACEABLE] hardware ECC syndrome based page read + * @mtd: mtd info structure + * @chip: nand chip info structure + * @buf: buffer to store read data + * @page: page number to read * - * The hw generator calculates the error syndrome automatically. Therefor - * we need a special oob layout and handling. + * The hw generator calculates the error syndrome automatically. Therefore we + * need a special oob layout and handling. */ static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) @@ -1384,29 +1373,29 @@ static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, } /** - * nand_transfer_oob - [Internal] Transfer oob to client buffer - * @chip: nand chip structure - * @oob: oob destination address - * @ops: oob ops structure - * @len: size of oob to transfer + * nand_transfer_oob - [INTERN] Transfer oob to client buffer + * @chip: nand chip structure + * @oob: oob destination address + * @ops: oob ops structure + * @len: size of oob to transfer */ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, struct mtd_oob_ops *ops, size_t len) { switch (ops->mode) { - case MTD_OOB_PLACE: - case MTD_OOB_RAW: + case MTD_OPS_PLACE_OOB: + case MTD_OPS_RAW: memcpy(oob, chip->oob_poi + ops->ooboffs, len); return oob + len; - case MTD_OOB_AUTO: { + case MTD_OPS_AUTO_OOB: { struct nand_oobfree *free = chip->ecc.layout->oobfree; uint32_t boffs = 0, roffs = ops->ooboffs; size_t bytes = 0; for (; free->length && len; free++, len -= bytes) { - /* Read request not from offset 0 ? */ + /* Read request not from offset 0? */ if (unlikely(roffs)) { if (roffs >= free->length) { roffs -= free->length; @@ -1432,11 +1421,10 @@ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, } /** - * nand_do_read_ops - [Internal] Read data with ECC - * - * @mtd: MTD device structure - * @from: offset to read from - * @ops: oob ops structure + * nand_do_read_ops - [INTERN] Read data with ECC + * @mtd: MTD device structure + * @from: offset to read from + * @ops: oob ops structure * * Internal function. Called with chip held. */ @@ -1451,7 +1439,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, int ret = 0; uint32_t readlen = ops->len; uint32_t oobreadlen = ops->ooblen; - uint32_t max_oobsize = ops->mode == MTD_OOB_AUTO ? + uint32_t max_oobsize = ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize; uint8_t *bufpoi, *oob, *buf; @@ -1473,7 +1461,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, bytes = min(mtd->writesize - col, readlen); aligned = (bytes == mtd->writesize); - /* Is the current page in the buffer ? */ + /* Is the current page in the buffer? */ if (realpage != chip->pagebuf || oob) { bufpoi = aligned ? buf : chip->buffers->databuf; @@ -1483,7 +1471,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, } /* Now read the page into the buffer */ - if (unlikely(ops->mode == MTD_OOB_RAW)) + if (unlikely(ops->mode == MTD_OPS_RAW)) ret = chip->ecc.read_page_raw(mtd, chip, bufpoi, page); else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob) @@ -1492,14 +1480,22 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, else ret = chip->ecc.read_page(mtd, chip, bufpoi, page); - if (ret < 0) + if (ret < 0) { + if (!aligned) + /* Invalidate page cache */ + chip->pagebuf = -1; break; + } /* Transfer not aligned data */ if (!aligned) { if (!NAND_SUBPAGE_READ(chip) && !oob && - !(mtd->ecc_stats.failed - stats.failed)) + !(mtd->ecc_stats.failed - stats.failed) && + (ops->mode != MTD_OPS_RAW)) chip->pagebuf = realpage; + else + /* Invalidate page cache */ + chip->pagebuf = -1; memcpy(buf, chip->buffers->databuf + col, bytes); } @@ -1539,7 +1535,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, if (!readlen) break; - /* For subsequent reads align to page boundary. */ + /* For subsequent reads align to page boundary */ col = 0; /* Increment page address */ realpage++; @@ -1552,8 +1548,9 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, chip->select_chip(mtd, chipnr); } - /* Check, if the chip supports auto page increment - * or if we have hit a block boundary. + /* + * Check, if the chip supports auto page increment or if we + * have hit a block boundary. */ if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) sndcmd = 1; @@ -1574,18 +1571,19 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, /** * nand_read - [MTD Interface] MTD compatibility function for nand_do_read_ecc - * @mtd: MTD device structure - * @from: offset to read from - * @len: number of bytes to read - * @retlen: pointer to variable to store the number of read bytes - * @buf: the databuffer to put data + * @mtd: MTD device structure + * @from: offset to read from + * @len: number of bytes to read + * @retlen: pointer to variab |