Besides the definitions of the the chips in flashchips.c this includes - a probing method (probe_spi_at25f) - a pretty printing method (spi_prettyprint_status_register_at25f), and - an unlocking method (spi_disable_blockprotect_at25f)
Signed-off-by: Stefan Tauner stefan.tauner@student.tuwien.ac.at --- at25.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ chipdrivers.h | 3 ++ flashchips.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++ flashchips.h | 10 ++--- spi.h | 9 +++-- 5 files changed, 199 insertions(+), 10 deletions(-)
diff --git a/at25.c b/at25.c index e4bd729..de2a9b7 100644 --- a/at25.c +++ b/at25.c @@ -63,6 +63,24 @@ static void spi_prettyprint_status_register_atmel_at25_swp(uint8_t status) } }
+/* used for AT25F512(A), AT25F1024(A) */ +int spi_prettyprint_status_register_at25f(struct flashchip *flash) +{ + uint8_t status; + + status = spi_read_status_register(); + msg_cdbg("Chip status register is %02x\n", status); + + spi_prettyprint_status_register_atmel_at25_wpen(status); + spi_prettyprint_status_register_bit(status, 6); + spi_prettyprint_status_register_bit(status, 5); + spi_prettyprint_status_register_bit(status, 4); + /* FIXME: Bit 3 is undefined on AT25F512A */ + spi_prettyprint_status_register_bp(status, 1); + spi_prettyprint_status_register_welwip(status); + return 0; +} + int spi_prettyprint_status_register_at25df(struct flashchip *flash) { uint8_t status; @@ -154,6 +172,57 @@ int spi_prettyprint_status_register_atmel_at26df081a(struct flashchip *flash) return 0; }
+int spi_disable_blockprotect_at25f(struct flashchip *flash) +{ + uint8_t status; + int result; + + status = spi_read_status_register(); + /* If block protection is disabled (BP0 and BP1 are 0), stop here. */ + if ((status & (3 << 2)) == 0) + return 0; + + msg_cdbg("Some block protection in effect, disabling\n"); + if (status & (1 << 7)) { + msg_cdbg("Need to disable Write Protect Enable (WPEN)\n"); + /* The following is used in spi_disable_blockprotect_at25df + * to check the state of the hardware lock pin. This is not + * possible with this chip, so we have to try. + if ((status & (1 << 4)) == 0) { + msg_cerr("WP# pin is active, disabling " + "write protection is impossible.\n"); + return 1; + } + */ + /* All bits except bit 7 (WPEN) are readonly. If the WP pin is + * low, WPEN is readonly and this will fail. */ + result = spi_write_status_register(flash, status & ~(1 << 7)); + if (result) { + msg_cerr("spi_write_status_register failed\n"); + return result; + } + status = spi_read_status_register(); + if (status & (1 << 7)) { + msg_cerr("WP# pin is probably active, disabling " + "write protection is impossible.\n"); + return 1; + } + + } + /* Global unprotect. Make sure to mask WPEN as well. */ + result = spi_write_status_register(flash, status & ~0x8c); + if (result) { + msg_cerr("spi_write_status_register failed\n"); + return result; + } + status = spi_read_status_register(); + if ((status & (3 << 2)) != 0) { + msg_cerr("Block protection could not be disabled!\n"); + return 1; + } + return 0; +} + int spi_disable_blockprotect_at25df(struct flashchip *flash) { uint8_t status; @@ -276,3 +345,31 @@ int spi_disable_blockprotect_at25fs040(struct flashchip *flash) } return 0; } + +int probe_spi_at25f(struct flashchip *flash) +{ + static const unsigned char cmd[AT25F_RDID_OUTSIZE] = { AT25F_RDID }; + unsigned char readarr[AT25F_RDID_INSIZE]; + uint32_t id1; + uint32_t id2; + + if (spi_send_command(sizeof(cmd), sizeof(readarr), cmd, readarr)) { + msg_cdbg("\n"); + return 0; + } + id1 = readarr[0]; + id2 = readarr[1]; + + msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2); + + if (id1 == flash->manufacture_id && id2 == flash->model_id) { + /* Print the status register to tell the + * user about possible write protection. + */ + spi_prettyprint_status_register_at25f(flash); + + return 1; + } + + return 0; +} diff --git a/chipdrivers.h b/chipdrivers.h index 7918308..7de17a4 100644 --- a/chipdrivers.h +++ b/chipdrivers.h @@ -66,6 +66,7 @@ int spi_prettyprint_status_register_amic_a25lq032(struct flashchip *flash); /* at25.c */ int spi_prettyprint_status_register_at25df(struct flashchip *flash); int spi_prettyprint_status_register_at25df_sec(struct flashchip *flash); +int spi_prettyprint_status_register_at25f(struct flashchip *flash); int spi_prettyprint_status_register_at25f512b(struct flashchip *flash); int spi_prettyprint_status_register_at25fs010(struct flashchip *flash); int spi_prettyprint_status_register_at25fs040(struct flashchip *flash); @@ -73,8 +74,10 @@ int spi_prettyprint_status_register_atmel_at26df081a(struct flashchip *flash); int spi_disable_blockprotect_at25df(struct flashchip *flash); int spi_disable_blockprotect_at25df_sec(struct flashchip *flash); int spi_disable_blockprotect_at25f512b(struct flashchip *flash); +int spi_disable_blockprotect_at25f(struct flashchip *flash); int spi_disable_blockprotect_at25fs010(struct flashchip *flash); int spi_disable_blockprotect_at25fs040(struct flashchip *flash); +int probe_spi_at25f(struct flashchip *flash);
/* 82802ab.c */ uint8_t wait_82802ab(struct flashchip *flash); diff --git a/flashchips.c b/flashchips.c index e021cbc..b3813a0 100644 --- a/flashchips.c +++ b/flashchips.c @@ -1651,6 +1651,65 @@ const struct flashchip flashchips[] = {
{ .vendor = "Atmel", + .name = "AT25F512", + .bustype = BUS_SPI, + .manufacture_id = ATMEL_ID, + .model_id = ATMEL_AT25F512, + .total_size = 64, + .page_size = 256, + .feature_bits = FEATURE_WRSR_WREN, + .tested = TEST_UNTESTED, + .probe = probe_spi_at25f, + .probe_timing = TIMING_ZERO, + .block_erasers = + { + { + .eraseblocks = { {32 * 1024, 2} }, + .block_erase = spi_block_erase_52, + }, { + .eraseblocks = { {64 * 1024, 1} }, + .block_erase = spi_block_erase_62, + } + }, + .printlock = spi_prettyprint_status_register_at25f, + .unlock = spi_disable_blockprotect_at25f, + .write = spi_chip_write_256, + .read = spi_chip_read, + .voltage = {2700, 3600}, + }, + + { + .vendor = "Atmel", + .name = "AT25F512A", + .bustype = BUS_SPI, + .manufacture_id = ATMEL_ID, + .model_id = ATMEL_AT25F512A, + .total_size = 64, + .page_size = 128, + .feature_bits = FEATURE_WRSR_WREN, + .tested = TEST_UNTESTED, + .probe = probe_spi_at25f, + .probe_timing = TIMING_ZERO, + .block_erasers = + { + { + .eraseblocks = { {32 * 1024, 2} }, + .block_erase = spi_block_erase_52, + }, { + .eraseblocks = { {64 * 1024, 1} }, + .block_erase = spi_block_erase_62, + } + }, + .printlock = spi_prettyprint_status_register_at25f, + /* Not correct to use this one, because the BP1 bit is N/A. */ + .unlock = spi_disable_blockprotect_at25f, + .write = spi_chip_write_256, + .read = spi_chip_read, + .voltage = {2700, 3600}, + }, + + { + .vendor = "Atmel", .name = "AT25F512B", .bustype = BUS_SPI, .manufacture_id = ATMEL_ID, @@ -1693,6 +1752,37 @@ const struct flashchip flashchips[] = {
{ .vendor = "Atmel", + /* The A suffix indicates 33MHz instead of 20MHz clock rate. + * All other properties seem to be the same.*/ + .name = "AT25F1024(A)", + .bustype = BUS_SPI, + .manufacture_id = ATMEL_ID, + .model_id = ATMEL_AT25F1024, + .total_size = 128, + .page_size = 256, + .feature_bits = FEATURE_WRSR_WREN, + .tested = TEST_OK_PREW, + .probe = probe_spi_at25f, + .probe_timing = TIMING_ZERO, + .block_erasers = + { + { + .eraseblocks = { {32 * 1024, 4} }, + .block_erase = spi_block_erase_52, + }, { + .eraseblocks = { {128 * 1024, 1} }, + .block_erase = spi_block_erase_62, + } + }, + .printlock = spi_prettyprint_status_register_at25f, + .unlock = spi_disable_blockprotect_at25f, + .write = spi_chip_write_256, + .read = spi_chip_read, + .voltage = {2700, 3600}, + }, + + { + .vendor = "Atmel", .name = "AT25FS010", .bustype = BUS_SPI, .manufacture_id = ATMEL_ID, diff --git a/flashchips.h b/flashchips.h index ff49d31..6470614 100644 --- a/flashchips.h +++ b/flashchips.h @@ -134,13 +134,11 @@ #define ATMEL_AT25DF321A 0x4701 #define ATMEL_AT25DF641 0x4800 #define ATMEL_AT25DQ161 0x8600 -#define ATMEL_AT25F512 /* No device ID found in datasheet. Vendor ID - * can be read with AT25F512A_RDID */ -#define ATMEL_AT25F512A 0x65 /* Needs AT25F512A_RDID */ +#define ATMEL_AT25F512 0x65 /* guessed, no device ID in datasheet. + * Vendor ID can be read with AT25F_RDID */ +#define ATMEL_AT25F512A 0x65 /* Needs AT25F_RDID */ #define ATMEL_AT25F512B 0x6500 -#define ATMEL_AT25F1024 /* No device ID found in datasheet. Vendor ID - * can be read with AT25F512A_RDID */ -#define ATMEL_AT25F1024A 0x60 /* Needs AT25F512A_RDID */ +#define ATMEL_AT25F1024 0x60 /* Needs AT25F_RDID */ #define ATMEL_AT25FS010 0x6601 #define ATMEL_AT25FS040 0x6604 #define ATMEL_AT26DF041 0x4400 diff --git a/spi.h b/spi.h index adb9109..a5c3406 100644 --- a/spi.h +++ b/spi.h @@ -30,10 +30,11 @@ /* INSIZE may be 0x04 for some chips*/ #define JEDEC_RDID_INSIZE 0x03
-/* AT25F512A has bit 3 as don't care bit in commands */ -#define AT25F512A_RDID 0x15 /* 0x15 or 0x1d */ -#define AT25F512A_RDID_OUTSIZE 0x01 -#define AT25F512A_RDID_INSIZE 0x02 +/* Some Atmel AT25F* models have bit 3 as don't care bit in commands */ +/* 0x15 or 0x1d */ +#define AT25F_RDID 0x15 +#define AT25F_RDID_OUTSIZE 0x01 +#define AT25F_RDID_INSIZE 0x02
/* Read Electronic Manufacturer Signature */ #define JEDEC_REMS 0x90
-
Stefan Tauner