usb: common: rename phy-fsm-usb.c to usb-otg-fsm.c

Since usb otg fsm implementation is not related to usb phy.
We move it from usb/phy/ to usb/common/, and rename it to
reflect its real meaning.

Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 0 insertions, 377 deletions

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 4c35d6176735..c9950becb7e0 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -6,15 +6,6 @@ menu "USB Physical Layer drivers"
 config USB_PHY
 	def_bool n
 
-config USB_OTG_FSM
-	tristate "USB 2.0 OTG FSM implementation"
-	depends on USB
-	select USB_OTG
-	select USB_PHY
-	help
-	  Implements OTG Final State Machine as specified in On-The-Go
-	  and Embedded Host Supplement to the USB Revision 2.0 Specification.
-
 #
 # USB Transceiver Drivers
 #
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index a2d05690d925..24a91332d4ad 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -3,7 +3,6 @@
 #
 obj-$(CONFIG_USB_PHY)			+= phy.o
 obj-$(CONFIG_OF)			+= of.o
-obj-$(CONFIG_USB_OTG_FSM)		+= phy-fsm-usb.o
 
 # transceiver drivers, keep the list sorted
 
diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c
deleted file mode 100644
index 98e8340a5bb1..000000000000
--- a/drivers/usb/phy/phy-fsm-usb.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * OTG Finite State Machine from OTG spec
- *
- * Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
- *
- * Author:	Li Yang <LeoLi@freescale.com>
- *		Jerry Huang <Chang-Ming.Huang@freescale.com>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the  GNU General Public License along
- * with this program; if not, write  to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mutex.h>
-#include <linux/delay.h>
-#include <linux/usb.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/otg-fsm.h>
-
-/* Change USB protocol when there is a protocol change */
-static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
-{
-	int ret = 0;
-
-	if (fsm->protocol != protocol) {
-		VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
-			fsm->protocol, protocol);
-		/* stop old protocol */
-		if (fsm->protocol == PROTO_HOST)
-			ret = otg_start_host(fsm, 0);
-		else if (fsm->protocol == PROTO_GADGET)
-			ret = otg_start_gadget(fsm, 0);
-		if (ret)
-			return ret;
-
-		/* start new protocol */
-		if (protocol == PROTO_HOST)
-			ret = otg_start_host(fsm, 1);
-		else if (protocol == PROTO_GADGET)
-			ret = otg_start_gadget(fsm, 1);
-		if (ret)
-			return ret;
-
-		fsm->protocol = protocol;
-		return 0;
-	}
-
-	return 0;
-}
-
-static int state_changed;
-
-/* Called when leaving a state.  Do state clean up jobs here */
-static 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);
-		fsm->b_se0_srp = 0;
-		fsm->adp_sns = 0;
-		fsm->adp_prb = 0;
-		break;
-	case OTG_STATE_B_SRP_INIT:
-		fsm->data_pulse = 0;
-		fsm->b_srp_done = 0;
-		break;
-	case OTG_STATE_B_PERIPHERAL:
-		break;
-	case OTG_STATE_B_WAIT_ACON:
-		otg_del_timer(fsm, B_ASE0_BRST);
-		fsm->b_ase0_brst_tmout = 0;
-		break;
-	case OTG_STATE_B_HOST:
-		break;
-	case OTG_STATE_A_IDLE:
-		fsm->adp_prb = 0;
-		break;
-	case OTG_STATE_A_WAIT_VRISE:
-		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);
-		fsm->a_wait_bcon_tmout = 0;
-		break;
-	case OTG_STATE_A_HOST:
-		otg_del_timer(fsm, A_WAIT_ENUM);
-		break;
-	case OTG_STATE_A_SUSPEND:
-		otg_del_timer(fsm, A_AIDL_BDIS);
-		fsm->a_aidl_bdis_tmout = 0;
-		fsm->a_suspend_req_inf = 0;
-		break;
-	case OTG_STATE_A_PERIPHERAL:
-		otg_del_timer(fsm, A_BIDL_ADIS);
-		fsm->a_bidl_adis_tmout = 0;
-		break;
-	case OTG_STATE_A_WAIT_VFALL:
-		otg_del_timer(fsm, A_WAIT_VFALL);
-		fsm->a_wait_vfall_tmout = 0;
-		otg_del_timer(fsm, A_WAIT_VRISE);
-		break;
-	case OTG_STATE_A_VBUS_ERR:
-		break;
-	default:
-		break;
-	}
-}
-
-/* Called when entering a state */
-static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
-{
-	state_changed = 1;
-	if (fsm->otg->phy->state == new_state)
-		return 0;
-	VDBG("Set state: %s\n", usb_otg_state_string(new_state));
-	otg_leave_state(fsm, fsm->otg->phy->state);
-	switch (new_state) {
-	case OTG_STATE_B_IDLE:
-		otg_drv_vbus(fsm, 0);
-		otg_chrg_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 0);
-		/*
-		 * Driver is responsible for starting ADP probing
-		 * if ADP sensing times out.
-		 */
-		otg_start_adp_sns(fsm);
-		otg_set_protocol(fsm, PROTO_UNDEF);
-		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);
-		break;
-	case OTG_STATE_B_PERIPHERAL:
-		otg_chrg_vbus(fsm, 0);
-		otg_loc_conn(fsm, 1);
-		otg_loc_sof(fsm, 0);
-		otg_set_protocol(fsm, PROTO_GADGET);
-		break;
-	case OTG_STATE_B_WAIT_ACON:
-		otg_chrg_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 0);
-		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, B_ASE0_BRST);
-		fsm->a_bus_suspend = 0;
-		break;
-	case OTG_STATE_B_HOST:
-		otg_chrg_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 1);
-		otg_set_protocol(fsm, PROTO_HOST);
-		usb_bus_start_enum(fsm->otg->host,
-				fsm->otg->host->otg_port);
-		break;
-	case OTG_STATE_A_IDLE:
-		otg_drv_vbus(fsm, 0);
-		otg_chrg_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 0);
-		otg_start_adp_prb(fsm);
-		otg_set_protocol(fsm, PROTO_HOST);
-		break;
-	case OTG_STATE_A_WAIT_VRISE:
-		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_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);
-		break;
-	case OTG_STATE_A_HOST:
-		otg_drv_vbus(fsm, 1);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 1);
-		otg_set_protocol(fsm, PROTO_HOST);
-		/*
-		 * When HNP is triggered while a_bus_req = 0, a_host will
-		 * suspend too fast to complete a_set_b_hnp_en
-		 */
-		if (!fsm->a_bus_req || fsm->a_suspend_req_inf)
-			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);
-
-		break;
-	case OTG_STATE_A_PERIPHERAL:
-		otg_loc_conn(fsm, 1);
-		otg_loc_sof(fsm, 0);
-		otg_set_protocol(fsm, PROTO_GADGET);
-		otg_drv_vbus(fsm, 1);
-		otg_add_timer(fsm, A_BIDL_ADIS);
-		break;
-	case OTG_STATE_A_WAIT_VFALL:
-		otg_drv_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 0);
-		otg_set_protocol(fsm, PROTO_HOST);
-		otg_add_timer(fsm, A_WAIT_VFALL);
-		break;
-	case OTG_STATE_A_VBUS_ERR:
-		otg_drv_vbus(fsm, 0);
-		otg_loc_conn(fsm, 0);
-		otg_loc_sof(fsm, 0);
-		otg_set_protocol(fsm, PROTO_UNDEF);
-		break;
-	default:
-		break;
-	}
-
-	fsm->otg->phy->state = new_state;
-	return 0;
-}
-
-/* State change judgement */
-int otg_statemachine(struct otg_fsm *fsm)
-{
-	enum usb_otg_state state;
-
-	mutex_lock(&fsm->lock);
-
-	state = fsm->otg->phy->state;
-	state_changed = 0;
-	/* State machine state change judgement */
-
-	switch (state) {
-	case OTG_STATE_UNDEFINED:
-		VDBG("fsm->id = %d\n", fsm->id);
-		if (fsm->id)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		else
-			otg_set_state(fsm, OTG_STATE_A_IDLE);
-		break;
-	case OTG_STATE_B_IDLE:
-		if (!fsm->id)
-			otg_set_state(fsm, OTG_STATE_A_IDLE);
-		else if (fsm->b_sess_vld && fsm->otg->gadget)
-			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
-		else if ((fsm->b_bus_req || fsm->adp_change || fsm->power_up) &&
-				fsm->b_ssend_srp && fsm->b_se0_srp)
-			otg_set_state(fsm, OTG_STATE_B_SRP_INIT);
-		break;
-	case OTG_STATE_B_SRP_INIT:
-		if (!fsm->id || fsm->b_srp_done)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		break;
-	case OTG_STATE_B_PERIPHERAL:
-		if (!fsm->id || !fsm->b_sess_vld)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		else if (fsm->b_bus_req && fsm->otg->
-				gadget->b_hnp_enable && fsm->a_bus_suspend)
-			otg_set_state(fsm, OTG_STATE_B_WAIT_ACON);
-		break;
-	case OTG_STATE_B_WAIT_ACON:
-		if (fsm->a_conn)
-			otg_set_state(fsm, OTG_STATE_B_HOST);
-		else if (!fsm->id || !fsm->b_sess_vld)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) {
-			fsm->b_ase0_brst_tmout = 0;
-			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
-		}
-		break;
-	case OTG_STATE_B_HOST:
-		if (!fsm->id || !fsm->b_sess_vld)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		else if (!fsm->b_bus_req || !fsm->a_conn || fsm->test_device)
-			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
-		break;
-	case OTG_STATE_A_IDLE:
-		if (fsm->id)
-			otg_set_state(fsm, OTG_STATE_B_IDLE);
-		else if (!fsm->a_bus_drop && (fsm->a_bus_req ||
-			  fsm->a_srp_det || fsm->adp_change || fsm->power_up))
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE);
-		break;
-	case OTG_STATE_A_WAIT_VRISE:
-		if (fsm->a_vbus_vld)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
-		else if (fsm->id || fsm->a_bus_drop ||
-				fsm->a_wait_vrise_tmout)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		break;
-	case OTG_STATE_A_WAIT_BCON:
-		if (!fsm->a_vbus_vld)
-			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
-		else if (fsm->b_conn)
-			otg_set_state(fsm, OTG_STATE_A_HOST);
-		else if (fsm->id || fsm->a_bus_drop || fsm->a_wait_bcon_tmout)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		break;
-	case OTG_STATE_A_HOST:
-		if (fsm->id || fsm->a_bus_drop)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) &&
-				fsm->otg->host->b_hnp_enable)
-			otg_set_state(fsm, OTG_STATE_A_SUSPEND);
-		else if (!fsm->b_conn)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
-		else if (!fsm->a_vbus_vld)
-			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
-		break;
-	case OTG_STATE_A_SUSPEND:
-		if (!fsm->b_conn && fsm->otg->host->b_hnp_enable)
-			otg_set_state(fsm, OTG_STATE_A_PERIPHERAL);
-		else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
-		else if (fsm->a_bus_req || fsm->b_bus_resume)
-			otg_set_state(fsm, OTG_STATE_A_HOST);
-		else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		else if (!fsm->a_vbus_vld)
-			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
-		break;
-	case OTG_STATE_A_PERIPHERAL:
-		if (fsm->id || fsm->a_bus_drop)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		else if (fsm->a_bidl_adis_tmout || fsm->b_bus_suspend)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
-		else if (!fsm->a_vbus_vld)
-			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
-		break;
-	case OTG_STATE_A_WAIT_VFALL:
-		if (fsm->a_wait_vfall_tmout)
-			otg_set_state(fsm, OTG_STATE_A_IDLE);
-		break;
-	case OTG_STATE_A_VBUS_ERR:
-		if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err)
-			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
-		break;
-	default:
-		break;
-	}
-	mutex_unlock(&fsm->lock);
-
-	VDBG("quit statemachine, changed = %d\n", state_changed);
-	return state_changed;
-}
-EXPORT_SYMBOL_GPL(otg_statemachine);