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authorPeter Chen <peter.chen@freescale.com>2014-04-29 04:35:59 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-28 02:29:44 +0400
commit1dfa91aa5ba9650acf59b6310d8e78a162d56410 (patch)
tree4778514fc4d2f70ac7348bdaf1f8d1a0f0726fcd /drivers/usb/phy
parentf4cbd33fd5f0587910fa9db403a1b42f1cabf820 (diff)
downloadlinux-1dfa91aa5ba9650acf59b6310d8e78a162d56410.tar.xz
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>
Diffstat (limited to 'drivers/usb/phy')
-rw-r--r--drivers/usb/phy/Kconfig9
-rw-r--r--drivers/usb/phy/Makefile1
-rw-r--r--drivers/usb/phy/phy-fsm-usb.c367
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);