usb: phy: Fix OTG FSM timer handling

Get rid of using OTG driver specific timers by passing timer
type to corresponding callbacks.

Signed-off-by: Anton Tikhomirov <av.tikhomirov@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

3 files changed, 87 insertions, 25 deletions

diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 8b34694..6495861 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -375,6 +375,40 @@ void fsl_otg_uninit_timers(void)
 	kfree(b_vbus_pulse_tmr);
 }
 
+static struct fsl_otg_timer *fsl_otg_get_timer(enum otg_fsm_timer t)
+{
+	struct fsl_otg_timer *timer;
+
+	/* REVISIT: use array of pointers to timers instead */
+	switch (t) {
+	case A_WAIT_VRISE:
+		timer = a_wait_vrise_tmr;
+		break;
+	case A_WAIT_BCON:
+		timer = a_wait_vrise_tmr;
+		break;
+	case A_AIDL_BDIS:
+		timer = a_wait_vrise_tmr;
+		break;
+	case B_ASE0_BRST:
+		timer = a_wait_vrise_tmr;
+		break;
+	case B_SE0_SRP:
+		timer = a_wait_vrise_tmr;
+		break;
+	case B_SRP_FAIL:
+		timer = a_wait_vrise_tmr;
+		break;
+	case A_WAIT_ENUM:
+		timer = a_wait_vrise_tmr;
+		break;
+	default:
+		timer = NULL;
+	}
+
+	return timer;
+}
+
 /* Add timer to timer list */
 void fsl_otg_add_timer(struct otg_fsm *fsm, void *gtimer)
 {
@@ -394,6 +428,17 @@ void fsl_otg_add_timer(struct otg_fsm *fsm, void *gtimer)
 	list_add_tail(&timer->list, &active_timers);
 }
 
+static void fsl_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
+{
+	struct fsl_otg_timer *timer;
+
+	timer = fsl_otg_get_timer(t);
+	if (!timer)
+		return;
+
+	fsl_otg_add_timer(fsm, timer);
+}
+
 /* Remove timer from the timer list; clear timeout status */
 void fsl_otg_del_timer(struct otg_fsm *fsm, void *gtimer)
 {
@@ -405,6 +450,17 @@ void fsl_otg_del_timer(struct otg_fsm *fsm, void *gtimer)
 			list_del(&timer->list);
 }
 
+static void fsl_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
+{
+	struct fsl_otg_timer *timer;
+
+	timer = fsl_otg_get_timer(t);
+	if (!timer)
+		return;
+
+	fsl_otg_del_timer(fsm, timer);
+}
+
 /*
  * Reduce timer count by 1, and find timeout conditions.
  * Called by fsl_otg 1ms timer interrupt
@@ -757,8 +813,8 @@ static struct otg_fsm_ops fsl_otg_ops = {
 	.loc_sof = fsl_otg_loc_sof,
 	.start_pulse = fsl_otg_start_pulse,
 
-	.add_timer = fsl_otg_add_timer,
-	.del_timer = fsl_otg_del_timer,
+	.add_timer = fsl_otg_fsm_add_timer,
+	.del_timer = fsl_otg_fsm_del_timer,
 
 	.start_host = fsl_otg_start_host,
 	.start_gadget = fsl_otg_start_gadget,
diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c
index 7898459..f8fe7ec 100644
--- a/drivers/usb/phy/phy-fsm-usb.c
+++ b/drivers/usb/phy/phy-fsm-usb.c
@@ -69,7 +69,7 @@ void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
 {
 	switch (old_state) {
 	case OTG_STATE_B_IDLE:
-		otg_del_timer(fsm, b_se0_srp_tmr);
+		otg_del_timer(fsm, B_SE0_SRP);
 		fsm->b_se0_srp = 0;
 		break;
 	case OTG_STATE_B_SRP_INIT:
@@ -78,7 +78,7 @@ void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
 	case OTG_STATE_B_PERIPHERAL:
 		break;
 	case OTG_STATE_B_WAIT_ACON:
-		otg_del_timer(fsm, b_ase0_brst_tmr);
+		otg_del_timer(fsm, B_ASE0_BRST);
 		fsm->b_ase0_brst_tmout = 0;
 		break;
 	case OTG_STATE_B_HOST:
@@ -86,25 +86,25 @@ void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
 	case OTG_STATE_A_IDLE:
 		break;
 	case OTG_STATE_A_WAIT_VRISE:
-		otg_del_timer(fsm, a_wait_vrise_tmr);
+		otg_del_timer(fsm, A_WAIT_VRISE);
 		fsm->a_wait_vrise_tmout = 0;
 		break;
 	case OTG_STATE_A_WAIT_BCON:
-		otg_del_timer(fsm, a_wait_bcon_tmr);
+		otg_del_timer(fsm, A_WAIT_BCON);
 		fsm->a_wait_bcon_tmout = 0;
 		break;
 	case OTG_STATE_A_HOST:
-		otg_del_timer(fsm, a_wait_enum_tmr);
+		otg_del_timer(fsm, A_WAIT_ENUM);
 		break;
 	case OTG_STATE_A_SUSPEND:
-		otg_del_timer(fsm, a_aidl_bdis_tmr);
+		otg_del_timer(fsm, A_AIDL_BDIS);
 		fsm->a_aidl_bdis_tmout = 0;
 		fsm->a_suspend_req = 0;
 		break;
 	case OTG_STATE_A_PERIPHERAL:
 		break;
 	case OTG_STATE_A_WAIT_VFALL:
-		otg_del_timer(fsm, a_wait_vrise_tmr);
+		otg_del_timer(fsm, A_WAIT_VRISE);
 		break;
 	case OTG_STATE_A_VBUS_ERR:
 		break;
@@ -128,13 +128,13 @@ int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
 		otg_loc_conn(fsm, 0);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_UNDEF);
-		otg_add_timer(fsm, b_se0_srp_tmr);
+		otg_add_timer(fsm, B_SE0_SRP);
 		break;
 	case OTG_STATE_B_SRP_INIT:
 		otg_start_pulse(fsm);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_UNDEF);
-		otg_add_timer(fsm, b_srp_fail_tmr);
+		otg_add_timer(fsm, B_SRP_FAIL);
 		break;
 	case OTG_STATE_B_PERIPHERAL:
 		otg_chrg_vbus(fsm, 0);
@@ -147,7 +147,7 @@ int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
 		otg_loc_conn(fsm, 0);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, b_ase0_brst_tmr);
+		otg_add_timer(fsm, B_ASE0_BRST);
 		fsm->a_bus_suspend = 0;
 		break;
 	case OTG_STATE_B_HOST:
@@ -170,14 +170,14 @@ int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
 		otg_loc_conn(fsm, 0);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, a_wait_vrise_tmr);
+		otg_add_timer(fsm, A_WAIT_VRISE);
 		break;
 	case OTG_STATE_A_WAIT_BCON:
 		otg_drv_vbus(fsm, 1);
 		otg_loc_conn(fsm, 0);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, a_wait_bcon_tmr);
+		otg_add_timer(fsm, A_WAIT_BCON);
 		break;
 	case OTG_STATE_A_HOST:
 		otg_drv_vbus(fsm, 1);
@@ -189,14 +189,14 @@ int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
 		 * suspend too fast to complete a_set_b_hnp_en
 		 */
 		if (!fsm->a_bus_req || fsm->a_suspend_req)
-			otg_add_timer(fsm, a_wait_enum_tmr);
+			otg_add_timer(fsm, A_WAIT_ENUM);
 		break;
 	case OTG_STATE_A_SUSPEND:
 		otg_drv_vbus(fsm, 1);
 		otg_loc_conn(fsm, 0);
 		otg_loc_sof(fsm, 0);
 		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, a_aidl_bdis_tmr);
+		otg_add_timer(fsm, A_AIDL_BDIS);
 
 		break;
 	case OTG_STATE_A_PERIPHERAL:
diff --git a/drivers/usb/phy/phy-fsm-usb.h b/drivers/usb/phy/phy-fsm-usb.h
index 157f106..b47b32c 100644
--- a/drivers/usb/phy/phy-fsm-usb.h
+++ b/drivers/usb/phy/phy-fsm-usb.h
@@ -34,6 +34,17 @@
 #define PROTO_HOST	(1)
 #define PROTO_GADGET	(2)
 
+enum otg_fsm_timer {
+	A_WAIT_VRISE,
+	A_WAIT_BCON,
+	A_AIDL_BDIS,
+	B_ASE0_BRST,
+	B_SE0_SRP,
+	B_SRP_FAIL,
+	A_WAIT_ENUM,
+	NUM_OTG_FSM_TIMERS,
+};
+
 /* OTG state machine according to the OTG spec */
 struct otg_fsm {
 	/* Input */
@@ -88,8 +99,8 @@ struct otg_fsm_ops {
 	void	(*loc_conn)(struct otg_fsm *fsm, int on);
 	void	(*loc_sof)(struct otg_fsm *fsm, int on);
 	void	(*start_pulse)(struct otg_fsm *fsm);
-	void	(*add_timer)(struct otg_fsm *fsm, void *timer);
-	void	(*del_timer)(struct otg_fsm *fsm, void *timer);
+	void	(*add_timer)(struct otg_fsm *fsm, enum otg_fsm_timer timer);
+	void	(*del_timer)(struct otg_fsm *fsm, enum otg_fsm_timer timer);
 	int	(*start_host)(struct otg_fsm *fsm, int on);
 	int	(*start_gadget)(struct otg_fsm *fsm, int on);
 };
@@ -144,7 +155,7 @@ static inline int otg_start_pulse(struct otg_fsm *fsm)
 	return 0;
 }
 
-static inline int otg_add_timer(struct otg_fsm *fsm, void *timer)
+static inline int otg_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer timer)
 {
 	if (!fsm->ops->add_timer)
 		return -EOPNOTSUPP;
@@ -152,7 +163,7 @@ static inline int otg_add_timer(struct otg_fsm *fsm, void *timer)
 	return 0;
 }
 
-static inline int otg_del_timer(struct otg_fsm *fsm, void *timer)
+static inline int otg_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer timer)
 {
 	if (!fsm->ops->del_timer)
 		return -EOPNOTSUPP;
@@ -175,8 +186,3 @@ static inline int otg_start_gadget(struct otg_fsm *fsm, int on)
 }
 
 int otg_statemachine(struct otg_fsm *fsm);
-
-/* Defined by device specific driver, for different timer implementation */
-extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
-	*a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
-	*a_wait_enum_tmr;