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| author | Donald Huang <donald.huang@ite.com.tw> | 2018-10-17 17:24:01 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-10-25 04:26:51 -0700 |
| commit | 33f6d2d5d32cc24792c463ba730bb79a82a4a529 (patch) | |
| tree | efee945775c6cf7550fdb1f621254e1d89f8fa2d /util/iteflash.c | |
| parent | 1044e1a5b50dbb0edf35aa178b7422715c0c458d (diff) | |
| download | chrome-ec-33f6d2d5d32cc24792c463ba730bb79a82a4a529.tar.gz | |
Disable the EC Read/Write Protect register at initial.
BRANCH=no
BUG=None
TEST=~/trunk/src/platform/ec/util/flash_ec --board=it83xx_evb
Change-Id: Ie03605f4d10db0760a7e6e3067837b6f9a21417c
Signed-off-by: Donald Huang <donald.huang@ite.com.tw>
Reviewed-on: https://chromium-review.googlesource.com/1286316
Commit-Ready: Dino Li <Dino.Li@ite.com.tw>
Tested-by: Dino Li <Dino.Li@ite.com.tw>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'util/iteflash.c')
| -rw-r--r-- | util/iteflash.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/util/iteflash.c b/util/iteflash.c index aeb868ec95..421a109bf4 100644 --- a/util/iteflash.c +++ b/util/iteflash.c @@ -506,6 +506,24 @@ static int dbgr_disable_watchdog(struct common_hnd *chnd) return 0; } +/* disable protect path from DBGR */ +static int dbgr_disable_protect_path(struct common_hnd *chnd) +{ + int ret = 0, i; + + ret |= i2c_write_byte(chnd, 0x2f, 0x20); + for (i = 0; i < 32; i++) { + ret |= i2c_write_byte(chnd, 0x2e, 0xa0+i); + ret |= i2c_write_byte(chnd, 0x30, 0); + } + + if (ret < 0) + printf("DISABLE PROTECT PATH FROM DBGR FAILED!\n"); + + return 0; +} + + /* Enter follow mode and FSCE# high level */ static int spi_flash_follow_mode(struct common_hnd *chnd, char *desc) { @@ -800,15 +818,19 @@ static int send_special_waveform(struct common_hnd *chnd) usleep(10 * MSEC); if (spi_flash_follow_mode(chnd, "enter follow mode") >= 0) { + spi_flash_follow_mode_exit(chnd, "exit follow mode"); /* * If we can talk to chip, then we can break the retry * loop */ ret = check_chipid(chnd); + /* disable watchdog before programming sequence */ - if (!ret) + if (!ret) { dbgr_disable_watchdog(chnd); + dbgr_disable_protect_path(chnd); + } } else { ret = -1; if (!(iterations % 10)) |