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ec/google/chromeec: query cbmem for retrain status 

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

Change-Id: Ic76cfb3255a8d3c179d5f8b13fa13c518f79faa2
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>
This commit is contained in:
Aaron Durbin 2016-12-14 14:46:20 -06:00
parent b2a5f4833d
commit 8f9a5ff8ec
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 <bootmode.h>
#include <cbmem.h>
#include <ec/google/chromeec/ec.h> #include <ec/google/chromeec/ec.h>
#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC_LPC) #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) 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 * Check if the EC has posted the keyboard recovery event with memory
* retrain. * retrain.
*/ */
return !!(google_chromeec_get_events_b() & events = google_chromeec_get_events_b();
EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
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) int clear_recovery_mode_switch(void)