diff options
| -rw-r--r-- | drivers/mtd/onenand/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 139 | ||||
| -rw-r--r-- | include/linux/mtd/onenand.h | 12 | ||||
| -rw-r--r-- | include/linux/mtd/onenand_regs.h | 4 |
4 files changed, 144 insertions, 27 deletions
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig index c257d39..64ec034 100644 --- a/drivers/mtd/onenand/Kconfig +++ b/drivers/mtd/onenand/Kconfig @@ -40,4 +40,20 @@ config MTD_ONENAND_OTP OTP block is fully-guaranteed to be a valid block. +config MTD_ONENAND_2X_PROGRAM + bool "OneNAND 2X program support" + help + The 2X Program is an extension of Program Operation. + Since the device is equipped with two DataRAMs, and two-plane NAND + Flash memory array, these two component enables simultaneous program + of 4KiB. Plane1 has only even blocks such as block0, block2, block4 + while Plane2 has only odd blocks such as block1, block3, block5. + So MTD regards it as 4KiB page size and 256KiB block size + + Now the following chips support it. (KFXXX16Q2M) + Demux: KFG2G16Q2M, KFH4G16Q2M, KFW8G16Q2M, + Mux: KFM2G16Q2M, KFN4G16Q2M, + + And more recent chips + endif # MTD_ONENAND diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 0537fac..7d194cf 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -206,6 +206,15 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le default: block = (int) (addr >> this->erase_shift); page = (int) (addr >> this->page_shift); + + if (ONENAND_IS_2PLANE(this)) { + /* Make the even block number */ + block &= ~1; + /* Is it the odd plane? */ + if (addr & this->writesize) + block++; + page >>= 1; + } page &= this->page_mask; break; } @@ -216,8 +225,12 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); - /* Switch to the next data buffer */ - ONENAND_SET_NEXT_BUFFERRAM(this); + if (ONENAND_IS_2PLANE(this)) + /* It is always BufferRAM0 */ + ONENAND_SET_BUFFERRAM0(this); + else + /* Switch to the next data buffer */ + ONENAND_SET_NEXT_BUFFERRAM(this); return 0; } @@ -247,6 +260,8 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le break; default: + if (ONENAND_IS_2PLANE(this) && cmd == ONENAND_CMD_PROG) + cmd = ONENAND_CMD_2X_PROG; dataram = ONENAND_CURRENT_BUFFERRAM(this); break; } @@ -445,8 +460,9 @@ static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area) struct onenand_chip *this = mtd->priv; if (ONENAND_CURRENT_BUFFERRAM(this)) { + /* Note: the 'this->writesize' is a real page size */ if (area == ONENAND_DATARAM) - return mtd->writesize; + return this->writesize; if (area == ONENAND_SPARERAM) return mtd->oobsize; } @@ -572,6 +588,30 @@ static int onenand_write_bufferram(struct mtd_info *mtd, int area, } /** + * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode + * @param mtd MTD data structure + * @param addr address to check + * @return blockpage address + * + * Get blockpage address at 2x program mode + */ +static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr) +{ + struct onenand_chip *this = mtd->priv; + int blockpage, block, page; + + /* Calculate the even block number */ + block = (int) (addr >> this->erase_shift) & ~1; + /* Is it the odd plane? */ + if (addr & this->writesize) + block++; + page = (int) (addr >> (this->page_shift + 1)) & this->page_mask; + blockpage = (block << 7) | page; + + return blockpage; +} + +/** * onenand_check_bufferram - [GENERIC] Check BufferRAM information * @param mtd MTD data structure * @param addr address to check @@ -585,7 +625,10 @@ static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr) int blockpage, found = 0; unsigned int i; - blockpage = (int) (addr >> this->page_shift); + if (ONENAND_IS_2PLANE(this)) + blockpage = onenand_get_2x_blockpage(mtd, addr); + else + blockpage = (int) (addr >> this->page_shift); /* Is there valid data? */ i = ONENAND_CURRENT_BUFFERRAM(this); @@ -625,7 +668,10 @@ static void onenand_update_bufferram(struct mtd_info *mtd, loff_t addr, int blockpage; unsigned int i; - blockpage = (int) (addr >> this->page_shift); + if (ONENAND_IS_2PLANE(this)) + blockpage = onenand_get_2x_blockpage(mtd, addr); + else + blockpage = (int) (addr >> this->page_shift); /* Invalidate another BufferRAM */ i = ONENAND_NEXT_BUFFERRAM(this); @@ -734,6 +780,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, int read = 0, column; int thislen; int ret = 0, boundary = 0; + int writesize = this->writesize; DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); @@ -754,22 +801,22 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, /* Do first load to bufferRAM */ if (read < len) { if (!onenand_check_bufferram(mtd, from)) { - this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); + this->command(mtd, ONENAND_CMD_READ, from, writesize); ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); } } - thislen = min_t(int, mtd->writesize, len - read); - column = from & (mtd->writesize - 1); - if (column + thislen > mtd->writesize) - thislen = mtd->writesize - column; + thislen = min_t(int, writesize, len - read); + column = from & (writesize - 1); + if (column + thislen > writesize) + thislen = writesize - column; while (!ret) { /* If there is more to load then start next load */ from += thislen; if (read + thislen < len) { - this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); + this->command(mtd, ONENAND_CMD_READ, from, writesize); /* * Chip boundary handling in DDP * Now we issued chip 1 read and pointed chip 1 @@ -794,7 +841,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, this->write_word(ONENAND_DDP_CHIP1, this->base + ONENAND_REG_START_ADDRESS2); ONENAND_SET_NEXT_BUFFERRAM(this); buf += thislen; - thislen = min_t(int, mtd->writesize, len - read); + thislen = min_t(int, writesize, len - read); column = 0; cond_resched(); /* Now wait for load */ @@ -1079,7 +1126,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from, /* Read more? */ if (read < len) { /* Update Page size */ - from += mtd->writesize; + from += this->writesize; column = 0; } } @@ -1135,12 +1182,12 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, int thislen, column; while (len != 0) { - thislen = min_t(int, mtd->writesize, len); - column = addr & (mtd->writesize - 1); - if (column + thislen > mtd->writesize) - thislen = mtd->writesize - column; + thislen = min_t(int, this->writesize, len); + column = addr & (this->writesize - 1); + if (column + thislen > this->writesize) + thislen = this->writesize - column; - this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize); + this->command(mtd, ONENAND_CMD_READ, addr, this->writesize); onenand_update_bufferram(mtd, addr, 0); @@ -1236,6 +1283,10 @@ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, /* In partial page write we don't update bufferram */ onenand_update_bufferram(mtd, to, !ret && !subpage); + if (ONENAND_IS_2PLANE(this)) { + ONENAND_SET_BUFFERRAM1(this); + onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage); + } if (ret) { printk(KERN_ERR "onenand_write: write filaed %d\n", ret); @@ -1384,6 +1435,10 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len, this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize); onenand_update_bufferram(mtd, to, 0); + if (ONENAND_IS_2PLANE(this)) { + ONENAND_SET_BUFFERRAM1(this); + onenand_update_bufferram(mtd, to + this->writesize, 0); + } ret = this->wait(mtd, FL_WRITING); if (ret) { @@ -2107,6 +2162,7 @@ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, * * Check and set OneNAND features * - lock scheme + * - two plane */ static void onenand_check_features(struct mtd_info *mtd) { @@ -2118,19 +2174,35 @@ static void onenand_check_features(struct mtd_info *mtd) process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; /* Lock scheme */ - if (density >= ONENAND_DEVICE_DENSITY_1Gb) { + switch (density) { + case ONENAND_DEVICE_DENSITY_4Gb: + this->options |= ONENAND_HAS_2PLANE; + + case ONENAND_DEVICE_DENSITY_2Gb: + /* 2Gb DDP don't have 2 plane */ + if (!ONENAND_IS_DDP(this)) + this->options |= ONENAND_HAS_2PLANE; + this->options |= ONENAND_HAS_UNLOCK_ALL; + + case ONENAND_DEVICE_DENSITY_1Gb: /* A-Die has all block unlock */ - if (process) { - printk(KERN_DEBUG "Chip support all block unlock\n"); + if (process) this->options |= ONENAND_HAS_UNLOCK_ALL; - } - } else { - /* Some OneNAND has continues lock scheme */ - if (!process) { - printk(KERN_DEBUG "Lock scheme is Continues Lock\n"); + break; + + default: + /* Some OneNAND has continuous lock scheme */ + if (!process) this->options |= ONENAND_HAS_CONT_LOCK; - } + break; } + + if (this->options & ONENAND_HAS_CONT_LOCK) + printk(KERN_DEBUG "Lock scheme is Continuous Lock\n"); + if (this->options & ONENAND_HAS_UNLOCK_ALL) + printk(KERN_DEBUG "Chip support all block unlock\n"); + if (this->options & ONENAND_HAS_2PLANE) + printk(KERN_DEBUG "Chip has 2 plane\n"); } /** @@ -2257,6 +2329,8 @@ static int onenand_probe(struct mtd_info *mtd) this->erase_shift = ffs(mtd->erasesize) - 1; this->page_shift = ffs(mtd->writesize) - 1; this->page_mask = (1 << (this->erase_shift - this->page_shift)) - 1; + /* It's real page size */ + this->writesize = mtd->writesize; /* REVIST: Multichip handling */ @@ -2265,6 +2339,17 @@ static int onenand_probe(struct mtd_info *mtd) /* Check OneNAND features */ onenand_check_features(mtd); + /* + * We emulate the 4KiB page and 256KiB erase block size + * But oobsize is still 64 bytes. + * It is only valid if you turn on 2X program support, + * Otherwise it will be ignored by compiler. + */ + if (ONENAND_IS_2PLANE(this)) { + mtd->writesize <<= 1; + mtd->erasesize <<= 1; + } + return 0; } diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index a56d24a..fd0a260 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -60,6 +60,7 @@ struct onenand_bufferram { * @erase_shift: [INTERN] number of address bits in a block * @page_shift: [INTERN] number of address bits in a page * @page_mask: [INTERN] a page per block mask + * @writesize: [INTERN] a real page size * @bufferram_index: [INTERN] BufferRAM index * @bufferram: [INTERN] BufferRAM info * @readw: [REPLACEABLE] hardware specific function for read short @@ -100,6 +101,7 @@ struct onenand_chip { unsigned int erase_shift; unsigned int page_shift; unsigned int page_mask; + unsigned int writesize; unsigned int bufferram_index; struct onenand_bufferram bufferram[MAX_BUFFERRAM]; @@ -140,6 +142,8 @@ struct onenand_chip { #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1) #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1) #define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1) +#define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0) +#define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1) #define ONENAND_GET_SYS_CFG1(this) \ (this->read_word(this->base + ONENAND_REG_SYS_CFG1)) @@ -149,6 +153,13 @@ struct onenand_chip { #define ONENAND_IS_DDP(this) \ (this->device_id & ONENAND_DEVICE_IS_DDP) +#ifdef CONFIG_MTD_ONENAND_2X_PROGRAM +#define ONENAND_IS_2PLANE(this) \ + (this->options & ONENAND_HAS_2PLANE) +#else +#define ONENAND_IS_2PLANE(this) (0) +#endif + /* Check byte access in OneNAND */ #define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1) @@ -157,6 +168,7 @@ struct onenand_chip { */ #define ONENAND_HAS_CONT_LOCK (0x0001) #define ONENAND_HAS_UNLOCK_ALL (0x0002) +#define ONENAND_HAS_2PLANE (0x0004) #define ONENAND_PAGEBUF_ALLOC (0x1000) #define ONENAND_OOBBUF_ALLOC (0x2000) diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index af94719..c46161f 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -74,6 +74,8 @@ #define ONENAND_DEVICE_DENSITY_512Mb (0x002) #define ONENAND_DEVICE_DENSITY_1Gb (0x003) +#define ONENAND_DEVICE_DENSITY_2Gb (0x004) +#define ONENAND_DEVICE_DENSITY_4Gb (0x005) /* * Version ID Register F002h (R) @@ -111,6 +113,8 @@ #define ONENAND_CMD_READOOB (0x13) #define ONENAND_CMD_PROG (0x80) #define ONENAND_CMD_PROGOOB (0x1A) +#define ONENAND_CMD_2X_PROG (0x7D) +#define ONENAND_CMD_2X_CACHE_PROG (0x7F) #define ONENAND_CMD_UNLOCK (0x23) #define ONENAND_CMD_LOCK (0x2A) #define ONENAND_CMD_LOCK_TIGHT (0x2C) |
