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UPSTREAM: ec/google/chromeec: query cbmem for retrain status

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The EC switches, including the hardware retrain flag, are
cleared when handing off the vboot state in romstage. However,
one may still want to query the state of the hardware retrain
flag. Thus, add a method to get the flag from cbmem.

BUG=chrome-os-partner:60592
BRANCH=reef
TEST=None

Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17869
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>

Change-Id: Ic76cfb3255a8d3c179d5f8b13fa13c518f79faa2
Reviewed-on: https://chromium-review.googlesource.com/421028
Commit-Ready: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aaron Durbin 2016-12-14 14:46:20 -06:00 • committed by chrome-bot
parent d3937f59c3
commit dd311e048a
1 changed files with 16 additions and 2 deletions
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18
src/ec/google/chromeec/switches.c
View file

@ -14,6 +14,7 @@
*/
#include <bootmode.h>
#include <cbmem.h>
#include <ec/google/chromeec/ec.h>
#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_LPC)
@ -41,12 +42,25 @@ int get_recovery_mode_switch(void)
int get_recovery_mode_retrain_switch(void)
{
uint32_t events;
const uint32_t mask =
EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT);
/*
* Check if the EC has posted the keyboard recovery event with memory
* retrain.
*/
return !!(google_chromeec_get_events_b() &
EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
events = google_chromeec_get_events_b();
if (cbmem_possibly_online()) {
const uint32_t *events_save;
events_save = cbmem_find(CBMEM_ID_EC_HOSTEVENT);
if (events_save != NULL)
events |= *events_save;
}
return !!(events & mask);
}
int clear_recovery_mode_switch(void)