diff options
Diffstat (limited to 'jedec.c')
| -rw-r--r-- | jedec.c | 524 |
1 files changed, 128 insertions, 396 deletions
@@ -38,14 +38,11 @@ uint8_t oddparity(uint8_t val) static void toggle_ready_jedec_common(const struct flashctx *flash, chipaddr dst, unsigned int delay) { unsigned int i = 0; - uint8_t tmp1, tmp2; - - tmp1 = chip_readb(flash, dst) & 0x40; + uint8_t tmp1 = chip_readb(flash, dst) & 0x40; while (i++ < 0xFFFFFFF) { - if (delay) - programmer_delay(delay); - tmp2 = chip_readb(flash, dst) & 0x40; + programmer_delay(flash, delay); + uint8_t tmp2 = chip_readb(flash, dst) & 0x40; if (tmp1 == tmp2) { break; } @@ -67,8 +64,9 @@ void toggle_ready_jedec(const struct flashctx *flash, chipaddr dst) * Given that erase is slow on all chips, it is recommended to use * toggle_ready_jedec_slow in erase functions. */ -static void toggle_ready_jedec_slow(const struct flashctx *flash, chipaddr dst) +static void toggle_ready_jedec_slow(const struct flashctx *flash) { + const chipaddr dst = flash->virtual_memory; toggle_ready_jedec_common(flash, dst, 8 * 1000); } @@ -76,12 +74,11 @@ void data_polling_jedec(const struct flashctx *flash, chipaddr dst, uint8_t data) { unsigned int i = 0; - uint8_t tmp; data &= 0x80; while (i++ < 0xFFFFFFF) { - tmp = chip_readb(flash, dst) & 0x80; + uint8_t tmp = chip_readb(flash, dst) & 0x80; if (tmp == data) { break; } @@ -109,10 +106,11 @@ static unsigned int getaddrmask(const struct flashchip *chip) } } -static void start_program_jedec_common(const struct flashctx *flash, unsigned int mask) +static void start_program_jedec_common(const struct flashctx *flash) { - chipaddr bios = flash->virtual_memory; - bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); + const chipaddr bios = flash->virtual_memory; + const bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); + const unsigned int mask = getaddrmask(flash->chip); chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); @@ -121,8 +119,8 @@ static void start_program_jedec_common(const struct flashctx *flash, unsigned in int probe_jedec_29gl(struct flashctx *flash) { - unsigned int mask = getaddrmask(flash->chip); - chipaddr bios = flash->virtual_memory; + const unsigned int mask = getaddrmask(flash->chip); + const chipaddr bios = flash->virtual_memory; const struct flashchip *chip = flash->chip; /* Reset chip to a clean slate */ @@ -143,7 +141,7 @@ int probe_jedec_29gl(struct flashctx *flash) /* Issue JEDEC Product ID Exit command */ chip_writeb(flash, 0xF0, bios + (0x5555 & mask)); - msg_cdbg("%s: man_id 0x%02x, dev_id 0x%06x", __func__, man_id, dev_id); + msg_cdbg("%s: man_id 0x%02"PRIx32", dev_id 0x%06"PRIx32"", __func__, man_id, dev_id); if (!oddparity(man_id)) msg_cdbg(", man_id parity violation"); @@ -165,59 +163,64 @@ int probe_jedec_29gl(struct flashctx *flash) return 1; } -static int probe_jedec_common(struct flashctx *flash, unsigned int mask) +static int probe_timings(const struct flashchip *chip, unsigned int *tenter, unsigned int *texit) { - chipaddr bios = flash->virtual_memory; + if (chip->probe_timing > 0) { + *tenter = *texit = chip->probe_timing; + } else if (chip->probe_timing == TIMING_ZERO) { /* No delay. */ + *tenter = *texit = 0; + } else if (chip->probe_timing == TIMING_FIXME) { /* == _IGNORED */ + msg_cdbg("Chip lacks correct probe timing information, using default 10ms/40us. "); + *tenter = 10000; + *texit = 40; + } else { + msg_cerr("Chip has negative value in probe_timing, failing without chip access\n"); + return -1; + } + + return 0; +} + +int probe_jedec(struct flashctx *flash) +{ + const chipaddr bios = flash->virtual_memory; const struct flashchip *chip = flash->chip; - bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); + const bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); + const unsigned int mask = getaddrmask(flash->chip); uint8_t id1, id2; uint32_t largeid1, largeid2; uint32_t flashcontent1, flashcontent2; unsigned int probe_timing_enter, probe_timing_exit; - if (chip->probe_timing > 0) - probe_timing_enter = probe_timing_exit = chip->probe_timing; - else if (chip->probe_timing == TIMING_ZERO) { /* No delay. */ - probe_timing_enter = probe_timing_exit = 0; - } else if (chip->probe_timing == TIMING_FIXME) { /* == _IGNORED */ - msg_cdbg("Chip lacks correct probe timing information, using default 10ms/40us. "); - probe_timing_enter = 10000; - probe_timing_exit = 40; - } else { - msg_cerr("Chip has negative value in probe_timing, failing without chip access\n"); + if (probe_timings(chip, &probe_timing_enter, &probe_timing_exit) < 0) return 0; - } /* Earlier probes might have been too fast for the chip to enter ID * mode completely. Allow the chip to finish this before seeing a * reset command. */ - if (probe_timing_enter) - programmer_delay(probe_timing_enter); + programmer_delay(flash, probe_timing_enter); /* Reset chip to a clean slate */ - if ((chip->feature_bits & FEATURE_RESET_MASK) == FEATURE_LONG_RESET) - { + if ((chip->feature_bits & FEATURE_RESET_MASK) == FEATURE_LONG_RESET) { chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); if (probe_timing_exit) - programmer_delay(10); + programmer_delay(flash, 10); chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); if (probe_timing_exit) - programmer_delay(10); + programmer_delay(flash, 10); } chip_writeb(flash, 0xF0, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - if (probe_timing_exit) - programmer_delay(probe_timing_exit); + programmer_delay(flash, probe_timing_exit); /* Issue JEDEC Product ID Entry command */ chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); if (probe_timing_enter) - programmer_delay(10); + programmer_delay(flash, 10); chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); if (probe_timing_enter) - programmer_delay(10); + programmer_delay(flash, 10); chip_writeb(flash, 0x90, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - if (probe_timing_enter) - programmer_delay(probe_timing_enter); + programmer_delay(flash, probe_timing_enter); /* Read product ID */ id1 = chip_readb(flash, bios + (0x00 << shifted)); @@ -238,20 +241,18 @@ static int probe_jedec_common(struct flashctx *flash, unsigned int mask) } /* Issue JEDEC Product ID Exit command */ - if ((chip->feature_bits & FEATURE_RESET_MASK) == FEATURE_LONG_RESET) - { + if ((chip->feature_bits & FEATURE_RESET_MASK) == FEATURE_LONG_RESET) { chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); if (probe_timing_exit) - programmer_delay(10); + programmer_delay(flash, 10); chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); if (probe_timing_exit) - programmer_delay(10); + programmer_delay(flash, 10); } chip_writeb(flash, 0xF0, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - if (probe_timing_exit) - programmer_delay(probe_timing_exit); + programmer_delay(flash, probe_timing_exit); - msg_cdbg("%s: id1 0x%02x, id2 0x%02x", __func__, largeid1, largeid2); + msg_cdbg("%s: id1 0x%02"PRIx32", id2 0x%02"PRIx32"", __func__, largeid1, largeid2); if (!oddparity(id1)) msg_cdbg(", id1 parity violation"); @@ -281,146 +282,107 @@ static int probe_jedec_common(struct flashctx *flash, unsigned int mask) return 1; } -static int erase_sector_jedec_common(struct flashctx *flash, unsigned int page, - unsigned int pagesize, unsigned int mask) +static void issuecmd(const struct flashctx *flash, uint8_t op, unsigned int operand) { - chipaddr bios = flash->virtual_memory; + const chipaddr bios = flash->virtual_memory; bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); - unsigned int delay_us = 0; + const unsigned int mask = getaddrmask(flash->chip); + unsigned int delay_us = (flash->chip->probe_timing == TIMING_ZERO) ? 0 : 10; - if(flash->chip->probe_timing != TIMING_ZERO) - delay_us = 10; + if (!operand) + operand = (shifted ? 0x2AAA : 0x5555) & mask; - /* Issue the Sector Erase command */ chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); + programmer_delay(flash, delay_us); chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x80, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); + programmer_delay(flash, delay_us); + chip_writeb(flash, op, bios + operand); + programmer_delay(flash, delay_us); +} - chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x30, bios + page); - programmer_delay(delay_us); +int erase_sector_jedec(struct flashctx *flash, unsigned int page, unsigned int size) +{ + /* Issue the Sector Erase command */ + issuecmd(flash, 0x80, 0); + issuecmd(flash, 0x30, page); - /* wait for Toggle bit ready */ - toggle_ready_jedec_slow(flash, bios); + /* Wait for Toggle bit ready */ + toggle_ready_jedec_slow(flash); /* FIXME: Check the status register for errors. */ return 0; } -static int erase_block_jedec_common(struct flashctx *flash, unsigned int block, - unsigned int blocksize, unsigned int mask) +int erase_block_jedec(struct flashctx *flash, unsigned int block, unsigned int size) { - chipaddr bios = flash->virtual_memory; - bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); - unsigned int delay_us = 0; - - if(flash->chip->probe_timing != TIMING_ZERO) - delay_us = 10; + /* Issue the Block Erase command */ + issuecmd(flash, 0x80, 0); + issuecmd(flash, 0x50, block); - /* Issue the Sector Erase command */ - chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x80, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - - chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x50, bios + block); - programmer_delay(delay_us); - - /* wait for Toggle bit ready */ - toggle_ready_jedec_slow(flash, bios); + /* Wait for Toggle bit ready */ + toggle_ready_jedec_slow(flash); /* FIXME: Check the status register for errors. */ return 0; } -static int erase_chip_jedec_common(struct flashctx *flash, unsigned int mask) +/* erase chip with block_erase() prototype */ +int erase_chip_block_jedec(struct flashctx *flash, unsigned int addr, unsigned int blocksize) { - chipaddr bios = flash->virtual_memory; - bool shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED); - unsigned int delay_us = 0; - - if(flash->chip->probe_timing != TIMING_ZERO) - delay_us = 10; - - /* Issue the JEDEC Chip Erase command */ - chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x80, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); + if ((addr != 0) || (blocksize != flash->chip->total_size * 1024)) { + msg_cerr("%s called with incorrect arguments\n", __func__); + return -1; + } - chip_writeb(flash, 0xAA, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x55, bios + ((shifted ? 0x5555 : 0x2AAA) & mask)); - programmer_delay(delay_us); - chip_writeb(flash, 0x10, bios + ((shifted ? 0x2AAA : 0x5555) & mask)); - programmer_delay(delay_us); + /* Issue the JEDEC Chip Erase command */ + issuecmd(flash, 0x80, 0); + issuecmd(flash, 0x10, 0); - toggle_ready_jedec_slow(flash, bios); + toggle_ready_jedec_slow(flash); /* FIXME: Check the status register for errors. */ return 0; } static int write_byte_program_jedec_common(const struct flashctx *flash, const uint8_t *src, - chipaddr dst, unsigned int mask) + chipaddr dst) { - int tried = 0, failed = 0; - chipaddr bios = flash->virtual_memory; + int tries = 0; /* If the data is 0xFF, don't program it and don't complain. */ if (*src == 0xFF) { return 0; } -retry: - /* Issue JEDEC Byte Program command */ - start_program_jedec_common(flash, mask); + for (; tries < MAX_REFLASH_TRIES; tries++) { + const chipaddr bios = flash->virtual_memory; + /* Issue JEDEC Byte Program command */ + start_program_jedec_common(flash); - /* transfer data from source to destination */ - chip_writeb(flash, *src, dst); - toggle_ready_jedec(flash, bios); + /* transfer data from source to destination */ + chip_writeb(flash, *src, dst); + toggle_ready_jedec(flash, bios); - if (chip_readb(flash, dst) != *src && tried++ < MAX_REFLASH_TRIES) { - goto retry; + if (chip_readb(flash, dst) == *src) + break; } - if (tried >= MAX_REFLASH_TRIES) - failed = 1; - - return failed; + return (tries >= MAX_REFLASH_TRIES) ? 1 : 0; } /* chunksize is 1 */ int write_jedec_1(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int len) { - unsigned int i; int failed = 0; chipaddr dst = flash->virtual_memory + start; - chipaddr olddst; - unsigned int mask; - - mask = getaddrmask(flash->chip); + const chipaddr olddst = dst; - olddst = dst; - for (i = 0; i < len; i++) { - if (write_byte_program_jedec_common(flash, src, dst, mask)) + for (unsigned int i = 0; i < len; i++) { + if (write_byte_program_jedec_common(flash, src, dst)) failed = 1; dst++, src++; + update_progress(flash, FLASHROM_PROGRESS_WRITE, i + 1, len); } if (failed) msg_cerr(" writing sector at 0x%" PRIxPTR " failed!\n", olddst); @@ -428,45 +390,43 @@ int write_jedec_1(struct flashctx *flash, const uint8_t *src, unsigned int start return failed; } -static int write_page_write_jedec_common(struct flashctx *flash, const uint8_t *src, +static int jedec_write_page(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int page_size) { - unsigned int i; - int tried = 0, failed; + int tries = 0, failed; const uint8_t *s = src; - chipaddr bios = flash->virtual_memory; + const chipaddr bios = flash->virtual_memory; chipaddr dst = bios + start; chipaddr d = dst; - unsigned int mask; - - mask = getaddrmask(flash->chip); -retry: - /* Issue JEDEC Start Program command */ - start_program_jedec_common(flash, mask); - - /* transfer data from source to destination */ - for (i = 0; i < page_size; i++) { - /* If the data is 0xFF, don't program it */ - if (*src != 0xFF) - chip_writeb(flash, *src, dst); - dst++; - src++; - } + for (; tries < MAX_REFLASH_TRIES; tries++) { + /* Issue JEDEC Start Program command */ + start_program_jedec_common(flash); + + /* transfer data from source to destination */ + for (unsigned int i = 0; i < page_size; i++) { + /* If the data is 0xFF, don't program it */ + if (*src != 0xFF) + chip_writeb(flash, *src, dst); + dst++; + src++; + } - toggle_ready_jedec(flash, dst - 1); + toggle_ready_jedec(flash, dst - 1); - dst = d; - src = s; - failed = verify_range(flash, src, start, page_size); + dst = d; + src = s; + failed = verify_range(flash, src, start, page_size); + if (!failed) + break; - if (failed && tried++ < MAX_REFLASH_TRIES) { msg_cerr("retrying.\n"); - goto retry; } + if (failed) { msg_cerr(" page 0x%" PRIxPTR " failed!\n", (d - bios) / page_size); } + return failed; } @@ -480,13 +440,14 @@ retry: int write_jedec(struct flashctx *flash, const uint8_t *buf, unsigned int start, int unsigned len) { - unsigned int i, starthere, lenhere; + unsigned int starthere, lenhere; /* FIXME: page_size is the wrong variable. We need max_writechunk_size * in struct flashctx to do this properly. All chips using * write_jedec have page_size set to max_writechunk_size, so * we're OK for now. */ - unsigned int page_size = flash->chip->page_size; + const unsigned int page_size = flash->chip->page_size; + const unsigned int nwrites = (start + len - 1) / page_size; /* Warning: This loop has a very unusual condition and body. * The loop needs to go through each page with at least one affected @@ -497,246 +458,17 @@ int write_jedec(struct flashctx *flash, const uint8_t *buf, unsigned int start, * (start + len - 1) / page_size. Since we want to include that last * page as well, the loop condition uses <=. */ - for (i = start / page_size; i <= (start + len - 1) / page_size; i++) { + for (unsigned int i = start / page_size; i <= nwrites; i++) { /* Byte position of the first byte in the range in this page. */ /* starthere is an offset to the base address of the chip. */ starthere = max(start, i * page_size); /* Length of bytes in the range in this page. */ lenhere = min(start + len, (i + 1) * page_size) - starthere; - if (write_page_write_jedec_common(flash, buf + starthere - start, starthere, lenhere)) + if (jedec_write_page(flash, buf + starthere - start, starthere, lenhere)) return 1; + update_progress(flash, FLASHROM_PROGRESS_WRITE, i + 1, nwrites + 1); } return 0; } - -/* erase chip with block_erase() prototype */ -int erase_chip_block_jedec(struct flashctx *flash, unsigned int addr, - unsigned int blocksize) -{ - unsigned int mask; - - mask = getaddrmask(flash->chip); - if ((addr != 0) || (blocksize != flash->chip->total_size * 1024)) { - msg_cerr("%s called with incorrect arguments\n", - __func__); - return -1; - } - return erase_chip_jedec_common(flash, mask); -} - -int probe_jedec(struct flashctx *flash) -{ - unsigned int mask; - - mask = getaddrmask(flash->chip); - return probe_jedec_common(flash, mask); -} - -int erase_sector_jedec(struct flashctx *flash, unsigned int page, - unsigned int size) -{ - unsigned int mask; - - mask = getaddrmask(flash->chip); - return erase_sector_jedec_common(flash, page, size, mask); -} - -int erase_block_jedec(struct flashctx *flash, unsigned int page, - unsigned int size) -{ - unsigned int mask; - - mask = getaddrmask(flash->chip); - return erase_block_jedec_common(flash, page, size, mask); -} - -struct unlockblock { - unsigned int size; - unsigned int count; -}; - -typedef int (*unlockblock_func)(const struct flashctx *flash, chipaddr offset); -static int regspace2_walk_unlockblocks(const struct flashctx *flash, const struct unlockblock *block, unlockblock_func func) -{ - chipaddr off = flash->virtual_registers + 2; - while (block->count != 0) { - unsigned int j; - for (j = 0; j < block->count; j++) { - if (func(flash, off)) - return -1; - off += block->size; - } - block++; - } - return 0; -} - -#define REG2_RWLOCK ((1 << 2) | (1 << 0)) -#define REG2_LOCKDOWN (1 << 1) -#define REG2_MASK (REG2_RWLOCK | REG2_LOCKDOWN) - -static int printlock_regspace2_block(const struct flashctx *flash, chipaddr lockreg) -{ - uint8_t state = chip_readb(flash, lockreg); - msg_cdbg("Lock status of block at 0x%0*" PRIxPTR " is ", PRIxPTR_WIDTH, lockreg); - switch (state & REG2_MASK) { - case 0: - msg_cdbg("Full Access.\n"); - break; - case 1: - msg_cdbg("Write Lock (Default State).\n"); - break; - case 2: - msg_cdbg("Locked Open (Full Access, Locked Down).\n"); - break; - case 3: - msg_cdbg("Write Lock, Locked Down.\n"); - break; - case 4: - msg_cdbg("Read Lock.\n"); - break; - case 5: - msg_cdbg("Read/Write Lock.\n"); - break; - case 6: - msg_cdbg("Read Lock, Locked Down.\n"); - break; - case 7: - msg_cdbg("Read/Write Lock, Locked Down.\n"); - break; - } - return 0; -} - -static int printlock_regspace2_uniform(struct flashctx *flash, unsigned long block_size) -{ - const unsigned int elems = flash->chip->total_size * 1024 / block_size; - struct unlockblock blocks[2] = {{.size = block_size, .count = elems}}; - return regspace2_walk_unlockblocks(flash, blocks, &printlock_regspace2_block); -} - -int printlock_regspace2_uniform_64k(struct flashctx *flash) -{ - return printlock_regspace2_uniform(flash, 64 * 1024); -} - -int printlock_regspace2_block_eraser_0(struct flashctx *flash) -{ - // FIXME: this depends on the eraseblocks not to be filled up completely (i.e. to be null-terminated). - const struct unlockblock *unlockblocks = - (const struct unlockblock *)flash->chip->block_erasers[0].eraseblocks; - return regspace2_walk_unlockblocks(flash, unlockblocks, &printlock_regspace2_block); -} - -int printlock_regspace2_block_eraser_1(struct flashctx *flash) -{ - // FIXME: this depends on the eraseblocks not to be filled up completely (i.e. to be null-terminated). - const struct unlockblock *unlockblocks = - (const struct unlockblock *)flash->chip->block_erasers[1].eraseblocks; - return regspace2_walk_unlockblocks(flash, unlockblocks, &printlock_regspace2_block); -} - -/* Try to change the lock register at address lockreg from cur to new. - * - * - Try to unlock the lock bit if requested and it is currently set (although this is probably futile). - * - Try to change the read/write bits if requested. - * - Try to set the lockdown bit if requested. - * Return an error immediately if any of this fails. */ -static int changelock_regspace2_block(const struct flashctx *flash, chipaddr lockreg, uint8_t cur, uint8_t new) -{ - /* Only allow changes to known read/write/lockdown bits */ - if (((cur ^ new) & ~REG2_MASK) != 0) { - msg_cerr("Invalid lock change from 0x%02x to 0x%02x requested at 0x%0*" PRIxPTR "!\n" - "Please report a bug at flashrom@flashrom.org\n", - cur, new, PRIxPTR_WIDTH, lockreg); - return -1; - } - - /* Exit early if no change (of read/write/lockdown bits) was requested. */ - if (((cur ^ new) & REG2_MASK) == 0) { - msg_cdbg2("Lock bits at 0x%0*" PRIxPTR " not changed.\n", PRIxPTR_WIDTH, lockreg); - return 0; - } - - /* Normally the lockdown bit can not be cleared. Try nevertheless if requested. */ - if ((cur & REG2_LOCKDOWN) && !(new & REG2_LOCKDOWN)) { - chip_writeb(flash, cur & ~REG2_LOCKDOWN, lockreg); - cur = chip_readb(flash, lockreg); - if ((cur & REG2_LOCKDOWN) == REG2_LOCKDOWN) { - msg_cwarn("Lockdown can't be removed at 0x%0*" PRIxPTR "! New value: 0x%02x.\n", - PRIxPTR_WIDTH, lockreg, cur); - return -1; - } - } - - /* Change read and/or write bit */ - if ((cur ^ new) & REG2_RWLOCK) { - /* Do not lockdown yet. */ - uint8_t wanted = (cur & ~REG2_RWLOCK) | (new & REG2_RWLOCK); - chip_writeb(flash, wanted, lockreg); - cur = chip_readb(flash, lockreg); - if (cur != wanted) { - msg_cerr("Changing lock bits failed at 0x%0*" PRIxPTR "! New value: 0x%02x.\n", - PRIxPTR_WIDTH, lockreg, cur); - return -1; - } - msg_cdbg("Changed lock bits at 0x%0*" PRIxPTR " to 0x%02x.\n", - PRIxPTR_WIDTH, lockreg, cur); - } - - /* Eventually, enable lockdown if requested. */ - if (!(cur & REG2_LOCKDOWN) && (new & REG2_LOCKDOWN)) { - chip_writeb(flash, new, lockreg); - cur = chip_readb(flash, lockreg); - if (cur != new) { - msg_cerr("Enabling lockdown FAILED at 0x%0*" PRIxPTR "! New value: 0x%02x.\n", - PRIxPTR_WIDTH, lockreg, cur); - return -1; - } - msg_cdbg("Enabled lockdown at 0x%0*" PRIxPTR ".\n", PRIxPTR_WIDTH, lockreg); - } - - return 0; -} - -static int unlock_regspace2_block_generic(const struct flashctx *flash, chipaddr lockreg) -{ - uint8_t old = chip_readb(flash, lockreg); - /* We don't care for the lockdown bit as long as the RW locks are 0 after we're done */ - return changelock_regspace2_block(flash, lockreg, old, old & ~REG2_RWLOCK); -} - -static int unlock_regspace2_uniform(struct flashctx *flash, unsigned long block_size) -{ - const unsigned int elems = flash->chip->total_size * 1024 / block_size; - struct unlockblock blocks[2] = {{.size = block_size, .count = elems}}; - return regspace2_walk_unlockblocks(flash, blocks, &unlock_regspace2_block_generic); -} - -int unlock_regspace2_uniform_64k(struct flashctx *flash) -{ - return unlock_regspace2_uniform(flash, 64 * 1024); -} - -int unlock_regspace2_uniform_32k(struct flashctx *flash) -{ - return unlock_regspace2_uniform(flash, 32 * 1024); -} - -int unlock_regspace2_block_eraser_0(struct flashctx *flash) -{ - // FIXME: this depends on the eraseblocks not to be filled up completely (i.e. to be null-terminated). - const struct unlockblock *unlockblocks = - (const struct unlockblock *)flash->chip->block_erasers[0].eraseblocks; - return regspace2_walk_unlockblocks(flash, unlockblocks, &unlock_regspace2_block_generic); -} - -int unlock_regspace2_block_eraser_1(struct flashctx *flash) -{ - // FIXME: this depends on the eraseblocks not to be filled up completely (i.e. to be null-terminated). - const struct unlockblock *unlockblocks = - (const struct unlockblock *)flash->chip->block_erasers[1].eraseblocks; - return regspace2_walk_unlockblocks(flash, unlockblocks, &unlock_regspace2_block_generic); -} |