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author | Randall Spangler <rspangler@chromium.org> | 2012-08-07 10:32:16 -0700 |
---|---|---|
committer | Gerrit <chrome-bot@google.com> | 2012-08-07 12:05:30 -0700 |
commit | 80e36e02549dc3bb121aee1619760198b706c406 (patch) | |
tree | 2879a37758ab994e355df50cd7f4a05d74baba8f /include/port80.h | |
parent | b383d4c6b8218300c14c6f853853cc09ea761c9d (diff) | |
download | chrome-ec-80e36e02549dc3bb121aee1619760198b706c406.tar.gz |
Enhance port 80 logging
- 'port80 intprint' toggles printing port 80 codes in interrupt
handler (turning that off speeds up port 80 capture a bit, if you're
sending port 80 codes very rapidly)
- 'port80 flush' flushes the log buffer
- log buffer expanded to 256 entries
- log buffer tracks S3->S0 power state transitions, so you can tell
where each boot starts
This uses ~500 bytes more RAM on the EC, but we've got piles of RAM
(with this change we're using 17KB out of 32KB).
BUG=none
TEST=manual
- boot system
- port80 -> prints data
- port80 intprint -> now disabled
- reboot; wait for reboot; no port80 debug output during boot
- port80 -> prints data from previous boot AND this one
- port80 flush
- port80 -> nothing in log
Change-Id: I64ee72fb13ab0fdd85d04b9640b5390fdac31400
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/29420
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'include/port80.h')
-rw-r--r-- | include/port80.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/port80.h b/include/port80.h index 787af8c169..0d251d1d1f 100644 --- a/include/port80.h +++ b/include/port80.h @@ -10,7 +10,15 @@ #include "common.h" -/* Called by LPC module when a byte of data is written to port 80. */ +enum port_80_event { + PORT_80_EVENT_RESUME = 0x1001, /* S3->S0 transition */ +}; + +/** + * Store data from a LPC write to port 80, or a port_80_event code. + * + * @param data Data written to port 80. + */ void port_80_write(int data); #endif /* __CROS_EC_PORT80_H */ |