diff options
Diffstat (limited to 'spi25.c')
| -rw-r--r-- | spi25.c | 77 |
1 files changed, 64 insertions, 13 deletions
@@ -1012,15 +1012,44 @@ int spi_chip_write_1(struct flashchip *flash, uint8_t *buf) int spi_aai_write(struct flashchip *flash, uint8_t *buf) { - uint32_t pos = 2, size = flash->total_size * 1024; - unsigned char w[6] = {0xad, 0, 0, 0, buf[0], buf[1]}; + uint32_t addr = 0; + uint32_t len = flash->total_size * 1024; + uint32_t pos = addr; int result; + unsigned char cmd[JEDEC_AAI_WORD_PROGRAM_CONT_OUTSIZE] = { + JEDEC_AAI_WORD_PROGRAM, + }; + struct spi_command cmds[] = { + { + .writecnt = JEDEC_WREN_OUTSIZE, + .writearr = (const unsigned char[]){ JEDEC_WREN }, + .readcnt = 0, + .readarr = NULL, + }, { + .writecnt = JEDEC_AAI_WORD_PROGRAM_OUTSIZE, + .writearr = (const unsigned char[]){ + JEDEC_AAI_WORD_PROGRAM, + (pos >> 16) & 0xff, + (pos >> 8) & 0xff, + (pos & 0xff), + buf[0], + buf[1] + }, + .readcnt = 0, + .readarr = NULL, + }, { + .writecnt = 0, + .writearr = NULL, + .readcnt = 0, + .readarr = NULL, + }}; switch (spi_controller) { #if CONFIG_INTERNAL == 1 #if defined(__i386__) || defined(__x86_64__) + case SPI_CONTROLLER_IT87XX: case SPI_CONTROLLER_WBSIO: - msg_cerr("%s: impossible with Winbond SPI masters," + msg_cerr("%s: impossible with this SPI controller," " degrading to byte program\n", __func__); return spi_chip_write_1(flash, buf); #endif @@ -1028,24 +1057,46 @@ int spi_aai_write(struct flashchip *flash, uint8_t *buf) default: break; } + + /* The data sheet requires a start address with the low bit cleared. */ + if (addr % 2) { + msg_cerr("%s: start address not even! Please report a bug at " + "flashrom@flashrom.org\n", __func__); + return SPI_GENERIC_ERROR; + } + /* The data sheet requires total AAI write length to be even. */ + if (len % 2) { + msg_cerr("%s: total write length not even! Please report a " + "bug at flashrom@flashrom.org\n", __func__); + return SPI_GENERIC_ERROR; + } + if (erase_flash(flash)) { msg_cerr("ERASE FAILED!\n"); return -1; } - /* FIXME: This will fail on ICH/VIA SPI. */ - result = spi_write_enable(); - if (result) + + result = spi_send_multicommand(cmds); + if (result) { + msg_cerr("%s failed during start command execution\n", + __func__); return result; - spi_send_command(6, 0, w, NULL); + } while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) - programmer_delay(5); /* SST25VF040B Tbp is max 10us */ - while (pos < size) { - w[1] = buf[pos++]; - w[2] = buf[pos++]; - spi_send_command(3, 0, w, NULL); + programmer_delay(10); + + /* We already wrote 2 bytes in the multicommand step. */ + pos += 2; + + while (pos < addr + len) { + cmd[1] = buf[pos++]; + cmd[2] = buf[pos++]; + spi_send_command(JEDEC_AAI_WORD_PROGRAM_CONT_OUTSIZE, 0, cmd, NULL); while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) - programmer_delay(5); /* SST25VF040B Tbp is max 10us */ + programmer_delay(10); } + + /* Use WRDI to exit AAI mode. */ spi_write_disable(); return 0; } |
