USB: add Freescale USB OTG Transceiver driver
Slightly reworked and cleaned up driver from Freescale LTIB
for MPC5121E. The driver has been ported to the current kernel,
proc interface "/proc/driver/fsl_usb2_otg" has been replaced by
sysfs interface.
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/otg/otg_fsm.h b/drivers/usb/otg/otg_fsm.h
new file mode 100644
index 0000000..0cecf1d
--- /dev/null
+++ b/drivers/usb/otg/otg_fsm.h
@@ -0,0 +1,154 @@
+/* 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.
+ */
+
+#undef DEBUG
+#undef VERBOSE
+
+#ifdef DEBUG
+#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
+ __func__, ## args)
+#else
+#define DBG(fmt, args...) do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define VDBG DBG
+#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)
+
+/* OTG state machine according to the OTG spec */
+struct otg_fsm {
+ /* Input */
+ int a_bus_resume;
+ int a_bus_suspend;
+ int a_conn;
+ int a_sess_vld;
+ int a_srp_det;
+ int a_vbus_vld;
+ int b_bus_resume;
+ int b_bus_suspend;
+ int b_conn;
+ int b_se0_srp;
+ int b_sess_end;
+ int b_sess_vld;
+ int id;
+
+ /* Internal variables */
+ int a_set_b_hnp_en;
+ int b_srp_done;
+ int b_hnp_enable;
+
+ /* Timeout indicator for timers */
+ int a_wait_vrise_tmout;
+ int a_wait_bcon_tmout;
+ int a_aidl_bdis_tmout;
+ int b_ase0_brst_tmout;
+
+ /* Informative variables */
+ int a_bus_drop;
+ int a_bus_req;
+ int a_clr_err;
+ int a_suspend_req;
+ int b_bus_req;
+
+ /* Output */
+ int drv_vbus;
+ int loc_conn;
+ int loc_sof;
+
+ struct otg_fsm_ops *ops;
+ struct otg_transceiver *transceiver;
+
+ /* Current usb protocol used: 0:undefine; 1:host; 2:client */
+ int protocol;
+ spinlock_t lock;
+};
+
+struct otg_fsm_ops {
+ void (*chrg_vbus)(int on);
+ void (*drv_vbus)(int on);
+ void (*loc_conn)(int on);
+ void (*loc_sof)(int on);
+ void (*start_pulse)(void);
+ void (*add_timer)(void *timer);
+ void (*del_timer)(void *timer);
+ int (*start_host)(struct otg_fsm *fsm, int on);
+ int (*start_gadget)(struct otg_fsm *fsm, int on);
+};
+
+
+static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
+{
+ fsm->ops->chrg_vbus(on);
+}
+
+static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
+{
+ if (fsm->drv_vbus != on) {
+ fsm->drv_vbus = on;
+ fsm->ops->drv_vbus(on);
+ }
+}
+
+static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_conn != on) {
+ fsm->loc_conn = on;
+ fsm->ops->loc_conn(on);
+ }
+}
+
+static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_sof != on) {
+ fsm->loc_sof = on;
+ fsm->ops->loc_sof(on);
+ }
+}
+
+static inline void otg_start_pulse(struct otg_fsm *fsm)
+{
+ fsm->ops->start_pulse();
+}
+
+static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->add_timer(timer);
+}
+
+static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->del_timer(timer);
+}
+
+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;