diff options
| -rw-r--r-- | common/cmd_eeprom.c | 51 |
1 files changed, 21 insertions, 30 deletions
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c index b39ca5d..d0942ef 100644 --- a/common/cmd_eeprom.c +++ b/common/cmd_eeprom.c @@ -146,38 +146,44 @@ static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen, return ret; } -int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) +static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer, + unsigned cnt, bool read) { unsigned end = offset + cnt; + unsigned alen, len; int rcode = 0; uchar addr[3]; - /* - * Read data until done or would cross a page boundary. - * We must write the address again when changing pages - * because the next page may be in a different device. - */ while (offset < end) { - unsigned alen, len; - alen = eeprom_addr(dev_addr, offset, addr); len = eeprom_len(offset, end); - rcode = eeprom_rw_block(offset, addr, alen, buffer, len, 1); + rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read); buffer += len; offset += len; + + if (!read) + udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); } return rcode; } -int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) +int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) { - unsigned end = offset + cnt; - int rcode = 0; - uchar addr[3]; + /* + * Read data until done or would cross a page boundary. + * We must write the address again when changing pages + * because the next page may be in a different device. + */ + return eeprom_rw(dev_addr, offset, buffer, cnt, 1); +} + +int eeprom_write(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) +{ + int ret; eeprom_write_enable(dev_addr, 1); @@ -186,25 +192,10 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn * We must write the address again when changing pages * because the address counter only increments within a page. */ - - while (offset < end) { - unsigned alen, len; - - alen = eeprom_addr(dev_addr, offset, addr); - - len = eeprom_len(offset, end); - - rcode = eeprom_rw_block(offset, addr, alen, buffer, len, 0); - - buffer += len; - offset += len; - - udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); - } + ret = eeprom_rw(dev_addr, offset, buffer, cnt, 1); eeprom_write_enable(dev_addr, 0); - - return rcode; + return ret; } static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |