usb: phy: move OTG FSM header

Other USB drivers may want to use OTG final state machine
implementation, so make this header available for them.

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

1 files changed, 244 insertions, 0 deletions

diff --git a/include/linux/usb/otg-fsm.h b/include/linux/usb/otg-fsm.h
new file mode 100644
index 000000000000..b6ba1bfb86f2
--- /dev/null
+++ b/include/linux/usb/otg-fsm.h
@@ -0,0 +1,244 @@
+/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_USB_OTG_FSM_H
+#define __LINUX_USB_OTG_FSM_H
+
+#include <linux/mutex.h>
+#include <linux/errno.h>
+
+#undef VERBOSE
+
+#ifdef VERBOSE
+#define VDBG(fmt, args...) pr_debug("[%s]  " fmt , \
+                                 __func__, ## args)
+#else
+#define VDBG(stuff...)  do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
+#else
+#define MPC_LOC do {} while (0)
+#endif
+
+#define PROTO_UNDEF     (0)
+#define PROTO_HOST      (1)
+#define PROTO_GADGET    (2)
+
+enum otg_fsm_timer {
+        /* Standard OTG timers */
+        A_WAIT_VRISE,
+        A_WAIT_VFALL,
+        A_WAIT_BCON,
+        A_AIDL_BDIS,
+        B_ASE0_BRST,
+        A_BIDL_ADIS,
+
+        /* Auxiliary timers */
+        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 */
+        int id;
+        int adp_change;
+        int power_up;
+        int test_device;
+        int a_bus_drop;
+        int a_bus_req;
+        int a_srp_det;
+        int a_vbus_vld;
+        int b_conn;
+        int a_bus_resume;
+        int a_bus_suspend;
+        int a_conn;
+        int b_bus_req;
+        int b_se0_srp;
+        int b_ssend_srp;
+        int b_sess_vld;
+        /* Auxilary inputs */
+        int a_sess_vld;
+        int b_bus_resume;
+        int b_bus_suspend;
+
+        /* Output */
+        int data_pulse;
+        int drv_vbus;
+        int loc_conn;
+        int loc_sof;
+        int adp_prb;
+        int adp_sns;
+
+        /* Internal variables */
+        int a_set_b_hnp_en;
+        int b_srp_done;
+        int b_hnp_enable;
+        int a_clr_err;
+
+        /* Informative variables */
+        int a_bus_drop_inf;
+        int a_bus_req_inf;
+        int a_clr_err_inf;
+        int b_bus_req_inf;
+        /* Auxilary informative variables */
+        int a_suspend_req_inf;
+
+        /* Timeout indicator for timers */
+        int a_wait_vrise_tmout;
+        int a_wait_vfall_tmout;
+        int a_wait_bcon_tmout;
+        int a_aidl_bdis_tmout;
+        int b_ase0_brst_tmout;
+        int a_bidl_adis_tmout;
+
+        struct otg_fsm_ops *ops;
+        struct usb_otg *otg;
+
+        /* Current usb protocol used: 0:undefine; 1:host; 2:client */
+        int protocol;
+        struct mutex lock;
+};
+
+struct otg_fsm_ops {
+        void    (*chrg_vbus)(struct otg_fsm *fsm, int on);
+        void    (*drv_vbus)(struct otg_fsm *fsm, int on);
+        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    (*start_adp_prb)(struct otg_fsm *fsm);
+        void    (*start_adp_sns)(struct otg_fsm *fsm);
+        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);
+};
+
+
+static inline int otg_chrg_vbus(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->chrg_vbus)
+                return -EOPNOTSUPP;
+        fsm->ops->chrg_vbus(fsm, on);
+        return 0;
+}
+
+static inline int otg_drv_vbus(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->drv_vbus)
+                return -EOPNOTSUPP;
+        if (fsm->drv_vbus != on) {
+                fsm->drv_vbus = on;
+                fsm->ops->drv_vbus(fsm, on);
+        }
+        return 0;
+}
+
+static inline int otg_loc_conn(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->loc_conn)
+                return -EOPNOTSUPP;
+        if (fsm->loc_conn != on) {
+                fsm->loc_conn = on;
+                fsm->ops->loc_conn(fsm, on);
+        }
+        return 0;
+}
+
+static inline int otg_loc_sof(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->loc_sof)
+                return -EOPNOTSUPP;
+        if (fsm->loc_sof != on) {
+                fsm->loc_sof = on;
+                fsm->ops->loc_sof(fsm, on);
+        }
+        return 0;
+}
+
+static inline int otg_start_pulse(struct otg_fsm *fsm)
+{
+        if (!fsm->ops->start_pulse)
+                return -EOPNOTSUPP;
+        if (!fsm->data_pulse) {
+                fsm->data_pulse = 1;
+                fsm->ops->start_pulse(fsm);
+        }
+        return 0;
+}
+
+static inline int otg_start_adp_prb(struct otg_fsm *fsm)
+{
+        if (!fsm->ops->start_adp_prb)
+                return -EOPNOTSUPP;
+        if (!fsm->adp_prb) {
+                fsm->adp_sns = 0;
+                fsm->adp_prb = 1;
+                fsm->ops->start_adp_prb(fsm);
+        }
+        return 0;
+}
+
+static inline int otg_start_adp_sns(struct otg_fsm *fsm)
+{
+        if (!fsm->ops->start_adp_sns)
+                return -EOPNOTSUPP;
+        if (!fsm->adp_sns) {
+                fsm->adp_sns = 1;
+                fsm->ops->start_adp_sns(fsm);
+        }
+        return 0;
+}
+
+static inline int otg_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer timer)
+{
+        if (!fsm->ops->add_timer)
+                return -EOPNOTSUPP;
+        fsm->ops->add_timer(fsm, timer);
+        return 0;
+}
+
+static inline int otg_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer timer)
+{
+        if (!fsm->ops->del_timer)
+                return -EOPNOTSUPP;
+        fsm->ops->del_timer(fsm, timer);
+        return 0;
+}
+
+static inline int otg_start_host(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->start_host)
+                return -EOPNOTSUPP;
+        return fsm->ops->start_host(fsm, on);
+}
+
+static inline int otg_start_gadget(struct otg_fsm *fsm, int on)
+{
+        if (!fsm->ops->start_gadget)
+                return -EOPNOTSUPP;
+        return fsm->ops->start_gadget(fsm, on);
+}
+
+int otg_statemachine(struct otg_fsm *fsm);
+
+#endif /* __LINUX_USB_OTG_FSM_H */