scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2026-01-05 14:31:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

g: debounce rdd disconnect

Browse Source 
When the EC does a sysjump it redoes the PD negotiation. This changes
the voltage levels on the CC lines. Debounce the rdd disconnect signal
for 2 seconds so cr50 will ignore the negotiation and keep CCD enabled.

BUG=chrome-os-partner:60924
BRANCH=none
TEST=connect suzyq. Make sure usb does not drop out during a EC sysjump
or reboot.

Change-Id: I95b9bc81f736e3b7a65103817c140874b1ed34ec
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/426398
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
This commit is contained in:
Mary Ruthven
2017-01-09 15:22:37 -08:00
committed by chrome-bot
parent f4c99dfd27
commit a9c79eede9
1 changed files with 18 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
chip/g/rdd.c
View File

@@ -31,30 +31,38 @@ int debug_cable_is_attached(void)
return (cc1 == cc2 && (cc1 == 3 || cc1 == 1));
}
static void rdd_disconnected(void)
{
CPRINTS("Debug Accessory disconnected");
rdd_detached();
}
DECLARE_DEFERRED(rdd_disconnected);
void rdd_interrupt(void)
{
int is_debug;
delay_sleep_by(1 * SECOND);
is_debug = debug_cable_is_attached();
if (debug_cable_is_attached()) {
/* cancel pending rdd disconnect */
hook_call_deferred(&rdd_disconnected_data, -1);
if (is_debug) {
CPRINTS("Debug Accessory connected");
/* Detect when debug cable is disconnected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DISCONNECT);
rdd_attached();
} else if (!is_debug) {
CPRINTS("Debug Accessory disconnected");
} else {
/* Detect when debug cable is connected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DEBUG);
rdd_detached();
cflush();
/*
* Debounce the RDD disconnect for 2 seconds so rdd events
* won't be triggered by any PD negotiation the EC does during
* reset or sysjump.
*/
hook_call_deferred(&rdd_disconnected_data, 2 * SECOND);
}
/* Clear interrupt */