diff options
Diffstat (limited to 'drivers/mtd/devices/m25p80.c')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 138 |
1 files changed, 89 insertions, 49 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index b35c3333e21..76a76751da3 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -39,6 +39,7 @@ #define OPCODE_PP 0x02 /* Page program (up to 256 bytes) */ #define OPCODE_BE_4K 0x20 /* Erase 4KiB block */ #define OPCODE_BE_32K 0x52 /* Erase 32KiB block */ +#define OPCODE_BE 0xc7 /* Erase whole flash block */ #define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */ #define OPCODE_RDID 0x9f /* Read JEDEC ID */ @@ -161,6 +162,31 @@ static int wait_till_ready(struct m25p *flash) return 1; } +/* + * Erase the whole flash memory + * + * Returns 0 if successful, non-zero otherwise. + */ +static int erase_block(struct m25p *flash) +{ + DEBUG(MTD_DEBUG_LEVEL3, "%s: %s %dKiB\n", + flash->spi->dev.bus_id, __func__, + flash->mtd.size / 1024); + + /* Wait until finished previous write command. */ + if (wait_till_ready(flash)) + return 1; + + /* Send write enable, then erase commands. */ + write_enable(flash); + + /* Set up command buffer. */ + flash->command[0] = OPCODE_BE; + + spi_write(flash->spi, flash->command, 1); + + return 0; +} /* * Erase one sector of flash memory at offset ``offset'' which is any @@ -229,15 +255,21 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr) */ /* now erase those sectors */ - while (len) { - if (erase_sector(flash, addr)) { - instr->state = MTD_ERASE_FAILED; - mutex_unlock(&flash->lock); - return -EIO; - } + if (len == flash->mtd.size && erase_block(flash)) { + instr->state = MTD_ERASE_FAILED; + mutex_unlock(&flash->lock); + return -EIO; + } else { + while (len) { + if (erase_sector(flash, addr)) { + instr->state = MTD_ERASE_FAILED; + mutex_unlock(&flash->lock); + return -EIO; + } - addr += mtd->erasesize; - len -= mtd->erasesize; + addr += mtd->erasesize; + len -= mtd->erasesize; + } } mutex_unlock(&flash->lock); @@ -437,6 +469,7 @@ struct flash_info { * then a two byte device id. */ u32 jedec_id; + u16 ext_id; /* The size listed here is what works with OPCODE_SE, which isn't * necessarily called a "sector" by the vendor. @@ -456,72 +489,75 @@ struct flash_info { static struct flash_info __devinitdata m25p_data [] = { /* Atmel -- some are (confusingly) marketed as "DataFlash" */ - { "at25fs010", 0x1f6601, 32 * 1024, 4, SECT_4K, }, - { "at25fs040", 0x1f6604, 64 * 1024, 8, SECT_4K, }, + { "at25fs010", 0x1f6601, 0, 32 * 1024, 4, SECT_4K, }, + { "at25fs040", 0x1f6604, 0, 64 * 1024, 8, SECT_4K, }, - { "at25df041a", 0x1f4401, 64 * 1024, 8, SECT_4K, }, - { "at25df641", 0x1f4800, 64 * 1024, 128, SECT_4K, }, + { "at25df041a", 0x1f4401, 0, 64 * 1024, 8, SECT_4K, }, + { "at25df641", 0x1f4800, 0, 64 * 1024, 128, SECT_4K, }, - { "at26f004", 0x1f0400, 64 * 1024, 8, SECT_4K, }, - { "at26df081a", 0x1f4501, 64 * 1024, 16, SECT_4K, }, - { "at26df161a", 0x1f4601, 64 * 1024, 32, SECT_4K, }, - { "at26df321", 0x1f4701, 64 * 1024, 64, SECT_4K, }, + { "at26f004", 0x1f0400, 0, 64 * 1024, 8, SECT_4K, }, + { "at26df081a", 0x1f4501, 0, 64 * 1024, 16, SECT_4K, }, + { "at26df161a", 0x1f4601, 0, 64 * 1024, 32, SECT_4K, }, + { "at26df321", 0x1f4701, 0, 64 * 1024, 64, SECT_4K, }, /* Spansion -- single (large) sector size only, at least * for the chips listed here (without boot sectors). */ - { "s25sl004a", 0x010212, 64 * 1024, 8, }, - { "s25sl008a", 0x010213, 64 * 1024, 16, }, - { "s25sl016a", 0x010214, 64 * 1024, 32, }, - { "s25sl032a", 0x010215, 64 * 1024, 64, }, - { "s25sl064a", 0x010216, 64 * 1024, 128, }, + { "s25sl004a", 0x010212, 0, 64 * 1024, 8, }, + { "s25sl008a", 0x010213, 0, 64 * 1024, 16, }, + { "s25sl016a", 0x010214, 0, 64 * 1024, 32, }, + { "s25sl032a", 0x010215, 0, 64 * 1024, 64, }, + { "s25sl064a", 0x010216, 0, 64 * 1024, 128, }, + { "s25sl12800", 0x012018, 0x0300, 256 * 1024, 64, }, + { "s25sl12801", 0x012018, 0x0301, 64 * 1024, 256, }, /* SST -- large erase sizes are "overlays", "sectors" are 4K */ - { "sst25vf040b", 0xbf258d, 64 * 1024, 8, SECT_4K, }, - { "sst25vf080b", 0xbf258e, 64 * 1024, 16, SECT_4K, }, - { "sst25vf016b", 0xbf2541, 64 * 1024, 32, SECT_4K, }, - { "sst25vf032b", 0xbf254a, 64 * 1024, 64, SECT_4K, }, + { "sst25vf040b", 0xbf258d, 0, 64 * 1024, 8, SECT_4K, }, + { "sst25vf080b", 0xbf258e, 0, 64 * 1024, 16, SECT_4K, }, + { "sst25vf016b", 0xbf2541, 0, 64 * 1024, 32, SECT_4K, }, + { "sst25vf032b", 0xbf254a, 0, 64 * 1024, 64, SECT_4K, }, /* ST Microelectronics -- newer production may have feature updates */ - { "m25p05", 0x202010, 32 * 1024, 2, }, - { "m25p10", 0x202011, 32 * 1024, 4, }, - { "m25p20", 0x202012, 64 * 1024, 4, }, - { "m25p40", 0x202013, 64 * 1024, 8, }, - { "m25p80", 0, 64 * 1024, 16, }, - { "m25p16", 0x202015, 64 * 1024, 32, }, - { "m25p32", 0x202016, 64 * 1024, 64, }, - { "m25p64", 0x202017, 64 * 1024, 128, }, - { "m25p128", 0x202018, 256 * 1024, 64, }, - - { "m45pe80", 0x204014, 64 * 1024, 16, }, - { "m45pe16", 0x204015, 64 * 1024, 32, }, - - { "m25pe80", 0x208014, 64 * 1024, 16, }, - { "m25pe16", 0x208015, 64 * 1024, 32, SECT_4K, }, + { "m25p05", 0x202010, 0, 32 * 1024, 2, }, + { "m25p10", 0x202011, 0, 32 * 1024, 4, }, + { "m25p20", 0x202012, 0, 64 * 1024, 4, }, + { "m25p40", 0x202013, 0, 64 * 1024, 8, }, + { "m25p80", 0, 0, 64 * 1024, 16, }, + { "m25p16", 0x202015, 0, 64 * 1024, 32, }, + { "m25p32", 0x202016, 0, 64 * 1024, 64, }, + { "m25p64", 0x202017, 0, 64 * 1024, 128, }, + { "m25p128", 0x202018, 0, 256 * 1024, 64, }, + + { "m45pe80", 0x204014, 0, 64 * 1024, 16, }, + { "m45pe16", 0x204015, 0, 64 * 1024, 32, }, + + { "m25pe80", 0x208014, 0, 64 * 1024, 16, }, + { "m25pe16", 0x208015, 0, 64 * 1024, 32, SECT_4K, }, /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ - { "w25x10", 0xef3011, 64 * 1024, 2, SECT_4K, }, - { "w25x20", 0xef3012, 64 * 1024, 4, SECT_4K, }, - { "w25x40", 0xef3013, 64 * 1024, 8, SECT_4K, }, - { "w25x80", 0xef3014, 64 * 1024, 16, SECT_4K, }, - { "w25x16", 0xef3015, 64 * 1024, 32, SECT_4K, }, - { "w25x32", 0xef3016, 64 * 1024, 64, SECT_4K, }, - { "w25x64", 0xef3017, 64 * 1024, 128, SECT_4K, }, + { "w25x10", 0xef3011, 0, 64 * 1024, 2, SECT_4K, }, + { "w25x20", 0xef3012, 0, 64 * 1024, 4, SECT_4K, }, + { "w25x40", 0xef3013, 0, 64 * 1024, 8, SECT_4K, }, + { "w25x80", 0xef3014, 0, 64 * 1024, 16, SECT_4K, }, + { "w25x16", 0xef3015, 0, 64 * 1024, 32, SECT_4K, }, + { "w25x32", 0xef3016, 0, 64 * 1024, 64, SECT_4K, }, + { "w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K, }, }; static struct flash_info *__devinit jedec_probe(struct spi_device *spi) { int tmp; u8 code = OPCODE_RDID; - u8 id[3]; + u8 id[5]; u32 jedec; + u16 ext_jedec; struct flash_info *info; /* JEDEC also defines an optional "extended device information" * string for after vendor-specific data, after the three bytes * we use here. Supporting some chips might require using it. */ - tmp = spi_write_then_read(spi, &code, 1, id, 3); + tmp = spi_write_then_read(spi, &code, 1, id, 5); if (tmp < 0) { DEBUG(MTD_DEBUG_LEVEL0, "%s: error %d reading JEDEC ID\n", spi->dev.bus_id, tmp); @@ -533,10 +569,14 @@ static struct flash_info *__devinit jedec_probe(struct spi_device *spi) jedec = jedec << 8; jedec |= id[2]; + ext_jedec = id[3] << 8 | id[4]; + for (tmp = 0, info = m25p_data; tmp < ARRAY_SIZE(m25p_data); tmp++, info++) { if (info->jedec_id == jedec) + if (ext_jedec != 0 && info->ext_id != ext_jedec) + continue; return info; } dev_err(&spi->dev, "unrecognized JEDEC id %06x\n", jedec); |