ENGR00320099 usb: chipidea: add vbus glitch handling

We add vbus glitch handling for both BSV rise and drop interruptes.
If it is a vbus glitch (higher than BSV but cannot reach AVV), ignore it.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index a30e2bf25ef9..bf85469993f2 100644
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -802,13 +802,8 @@ irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
                         }
                 } else if (otg_int_src & OTGSC_BSVIS) {
                         hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
-                        ci->b_sess_valid_event = true;
-                        if (otgsc & OTGSC_BSV) {
-                                fsm->b_sess_vld = 1;
-                                ci_otg_del_timer(ci, B_SSEND_SRP);
-                                ci_otg_del_timer(ci, B_SRP_FAIL);
-                                fsm->b_ssend_srp = 0;
-                        } else {
+                        ci->vbus_glitch_check_event = true;
+                        if (!(otgsc & OTGSC_BSV) && fsm->b_sess_vld) {
                                 fsm->b_sess_vld = 0;
                                 if (fsm->id)
                                         ci_otg_add_timer(ci, B_SSEND_SRP);