diff options
Diffstat (limited to 'spi.c')
| -rw-r--r-- | spi.c | 36 |
1 files changed, 31 insertions, 5 deletions
@@ -618,19 +618,45 @@ int spi_chip_read(struct flashchip *flash, uint8_t *buf) return 1; } +/* + * Program chip using byte programming. (SLOW!) + * This is for chips which can only handle one byte writes + * and for chips where memory mapped programming is impossible + * (e.g. due to size constraints in IT87* for over 512 kB) + */ +int spi_chip_write_1(struct flashchip *flash, uint8_t *buf) +{ + int total_size = 1024 * flash->total_size; + int i; + + spi_disable_blockprotect(); + for (i = 0; i < total_size; i++) { + spi_write_enable(); + spi_byte_program(i, buf[i]); + while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) + myusec_delay(10); + } + + return 0; +} + +/* + * Program chip using page (256 bytes) programming. + * Some SPI masters can't do this, they use single byte programming instead. + */ int spi_chip_write(struct flashchip *flash, uint8_t *buf) { switch (flashbus) { case BUS_TYPE_IT87XX_SPI: - return it8716f_spi_chip_write(flash, buf); + return it8716f_spi_chip_write_256(flash, buf); case BUS_TYPE_SB600_SPI: - return sb600_spi_write(flash, buf); + return sb600_spi_write_1(flash, buf); case BUS_TYPE_ICH7_SPI: case BUS_TYPE_ICH9_SPI: case BUS_TYPE_VIA_SPI: - return ich_spi_write(flash, buf); + return ich_spi_write_256(flash, buf); case BUS_TYPE_WBSIO_SPI: - return wbsio_spi_write(flash, buf); + return wbsio_spi_write_1(flash, buf); default: printf_debug ("%s called, but no SPI chipset/strapping detected\n", @@ -650,7 +676,7 @@ int spi_aai_write(struct flashchip *flash, uint8_t *buf) case BUS_TYPE_WBSIO_SPI: fprintf(stderr, "%s: impossible with Winbond SPI masters," " degrading to byte program\n", __func__); - return spi_chip_write(flash, buf); + return spi_chip_write_1(flash, buf); default: break; } |
