usb: phy: Handle per-PHY event for connnect and disconnect events

When usb is connected and enumerated in device mode or when
usb is disconnected, call usb_phy_set_event() from phy drivers
to handle per-PHY event.

[ toddpoynor@google.com : Original patch in Android ]

Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Cc: Android Kernel Team <kernel-team@android.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Benoit Goby <benoit@android.com>
Cc: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Kiran Raparthy <kiran.kumar@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 21 insertions, 0 deletions

diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index 30c96f08308b..8cd7d193c2ca 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -445,6 +445,7 @@ static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
                         event = UX500_MUSB_NONE;
                 /* Fallback to default B_IDLE as nothing is connected. */
                 ab->phy.otg->state = OTG_STATE_B_IDLE;
+                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                 break;
 
         case USB_LINK_ACA_RID_C_NM_9540:
@@ -459,12 +460,14 @@ static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
                         ab8500_usb_peri_phy_en(ab);
                         atomic_notifier_call_chain(&ab->phy.notifier,
                                         UX500_MUSB_PREPARE, &ab->vbus_draw);
+                        usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
                 }
                 if (ab->mode == USB_IDLE) {
                         ab->mode = USB_PERIPHERAL;
                         ab8500_usb_peri_phy_en(ab);
                         atomic_notifier_call_chain(&ab->phy.notifier,
                                         UX500_MUSB_PREPARE, &ab->vbus_draw);
+                        usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
                 }
                 if (event != UX500_MUSB_RIDC)
                         event = UX500_MUSB_VBUS;
@@ -500,6 +503,7 @@ static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
                 event = UX500_MUSB_CHARGER;
                 atomic_notifier_call_chain(&ab->phy.notifier,
                                 event, &ab->vbus_draw);
+                usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
                 break;
 
         case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540:
@@ -524,6 +528,7 @@ static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
                                 ab->mode = USB_IDLE;
                                 ab->phy.otg->default_a = false;
                                 ab->vbus_draw = 0;
+                                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                         }
                 }
                 break;
@@ -583,6 +588,7 @@ static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
                  * is connected
                  */
                 ab->phy.otg->state = OTG_STATE_B_IDLE;
+                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                 break;
 
         case USB_LINK_ACA_RID_C_NM_8540:
@@ -596,6 +602,7 @@ static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
                         ab8500_usb_peri_phy_en(ab);
                         atomic_notifier_call_chain(&ab->phy.notifier,
                                         UX500_MUSB_PREPARE, &ab->vbus_draw);
+                        usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
                 }
                 if (event != UX500_MUSB_RIDC)
                         event = UX500_MUSB_VBUS;
@@ -624,6 +631,7 @@ static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
                 event = UX500_MUSB_CHARGER;
                 atomic_notifier_call_chain(&ab->phy.notifier,
                                 event, &ab->vbus_draw);
+                usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
                 break;
 
         case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540:
@@ -646,6 +654,7 @@ static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
                         ab->mode = USB_IDLE;
                         ab->phy.otg->default_a = false;
                         ab->vbus_draw = 0;
+                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                 }
                 break;
 
@@ -692,6 +701,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
                  * is connected
                  */
                 ab->phy.otg->state = OTG_STATE_B_IDLE;
+                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                 break;
 
         case USB_LINK_ACA_RID_C_NM_8505:
@@ -705,6 +715,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
                         ab8500_usb_peri_phy_en(ab);
                         atomic_notifier_call_chain(&ab->phy.notifier,
                                         UX500_MUSB_PREPARE, &ab->vbus_draw);
+                        usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
                 }
                 if (event != UX500_MUSB_RIDC)
                         event = UX500_MUSB_VBUS;
@@ -732,6 +743,7 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
                 event = UX500_MUSB_CHARGER;
                 atomic_notifier_call_chain(&ab->phy.notifier,
                                 event, &ab->vbus_draw);
+                usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
                 break;
 
         default:
@@ -775,6 +787,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
                         event = UX500_MUSB_NONE;
                 /* Fallback to default B_IDLE as nothing is connected */
                 ab->phy.otg->state = OTG_STATE_B_IDLE;
+                usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
                 break;
 
         case USB_LINK_ACA_RID_C_NM_8500:
@@ -792,6 +805,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
                         ab8500_usb_peri_phy_en(ab);
                         atomic_notifier_call_chain(&ab->phy.notifier,
                                         UX500_MUSB_PREPARE, &ab->vbus_draw);
+                        usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
                 }
                 if (event != UX500_MUSB_RIDC)
                         event = UX500_MUSB_VBUS;
@@ -818,6 +832,7 @@ static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
                 event = UX500_MUSB_CHARGER;
                 atomic_notifier_call_chain(&ab->phy.notifier,
                                 event, &ab->vbus_draw);
+                usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
                 break;
 
         case USB_LINK_RESERVED_8500:
diff --git a/drivers/usb/phy/phy-gpio-vbus-usb.c b/drivers/usb/phy/phy-gpio-vbus-usb.c
index 9fcf19ba1416..54511725caaf 100644
--- a/drivers/usb/phy/phy-gpio-vbus-usb.c
+++ b/drivers/usb/phy/phy-gpio-vbus-usb.c
@@ -134,6 +134,7 @@ static void gpio_vbus_work(struct work_struct *work)
 
                 atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
                                            status, gpio_vbus->phy.otg->gadget);
+                usb_phy_set_event(&gpio_vbus->phy, USB_EVENT_ENUMERATED);
         } else {
                 /* optionally disable D+ pullup */
                 if (gpio_is_valid(gpio))
@@ -148,6 +149,7 @@ static void gpio_vbus_work(struct work_struct *work)
 
                 atomic_notifier_call_chain(&gpio_vbus->phy.notifier,
                                            status, gpio_vbus->phy.otg->gadget);
+                usb_phy_set_event(&gpio_vbus->phy, USB_EVENT_NONE);
         }
 }
 
diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c
index 81d934fdd0c3..b234d46cd58b 100644
--- a/drivers/usb/phy/phy-mv-usb.c
+++ b/drivers/usb/phy/phy-mv-usb.c
@@ -441,10 +441,12 @@ run:
                                 mv_otg_start_periphrals(mvotg, 0);
                         mv_otg_reset(mvotg);
                         mv_otg_disable(mvotg);
+                        usb_phy_set_event(&mvotg->phy, USB_EVENT_NONE);
                         break;
                 case OTG_STATE_B_PERIPHERAL:
                         mv_otg_enable(mvotg);
                         mv_otg_start_periphrals(mvotg, 1);
+                        usb_phy_set_event(&mvotg->phy, USB_EVENT_ENUMERATED);
                         break;
                 case OTG_STATE_A_IDLE:
                         otg->default_a = 1;
diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index 9cabc1a20d1c..d391c79a542a 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -87,6 +87,7 @@ static void check_vbus_state(struct tahvo_usb *tu)
                         if (tu->phy.otg->gadget)
                                 usb_gadget_vbus_connect(tu->phy.otg->gadget);
                         tu->phy.otg->state = OTG_STATE_B_PERIPHERAL;
+                        usb_phy_set_event(&tu->phy, USB_EVENT_ENUMERATED);
                         break;
                 case OTG_STATE_A_IDLE:
                         /*
@@ -105,6 +106,7 @@ static void check_vbus_state(struct tahvo_usb *tu)
                         if (tu->phy.otg->gadget)
                                 usb_gadget_vbus_disconnect(tu->phy.otg->gadget);
                         tu->phy.otg->state = OTG_STATE_B_IDLE;
+                        usb_phy_set_event(&tu->phy, USB_EVENT_NONE);
                         break;
                 case OTG_STATE_A_HOST:
                         tu->phy.otg->state = OTG_STATE_A_IDLE;