usb: chipidea: usb OTG fsm initialization.

This patch adds OTG fsm related initialization when do otg init,
add a seperate file for OTG fsm related utilities.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
new file mode 100644
index 000000000000..d9dfaa3cf40c
--- /dev/null
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -0,0 +1,63 @@
+/*
+ * otg_fsm.c - ChipIdea USB IP core OTG FSM driver
+ *
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * Author: Jun Li
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This file mainly handles OTG fsm, it includes OTG fsm operations
+ * for HNP and SRP.
+ */
+
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "bits.h"
+#include "otg.h"
+#include "otg_fsm.h"
+
+int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
+{
+	struct usb_otg *otg;
+
+	otg = devm_kzalloc(ci->dev,
+			sizeof(struct usb_otg), GFP_KERNEL);
+	if (!otg) {
+		dev_err(ci->dev,
+		"Failed to allocate usb_otg structure for ci hdrc otg!\n");
+		return -ENOMEM;
+	}
+
+	otg->phy = ci->transceiver;
+	otg->gadget = &ci->gadget;
+	ci->fsm.otg = otg;
+	ci->transceiver->otg = ci->fsm.otg;
+	ci->fsm.power_up = 1;
+	ci->fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
+	ci->transceiver->state = OTG_STATE_UNDEFINED;
+
+	mutex_init(&ci->fsm.lock);
+
+	/* Enable A vbus valid irq */
+	hw_write_otgsc(ci, OTGSC_AVVIE, OTGSC_AVVIE);
+
+	if (ci->fsm.id) {
+		ci->fsm.b_ssend_srp =
+			hw_read_otgsc(ci, OTGSC_BSV) ? 0 : 1;
+		ci->fsm.b_sess_vld =
+			hw_read_otgsc(ci, OTGSC_BSV) ? 1 : 0;
+		/* Enable BSV irq */
+		hw_write_otgsc(ci, OTGSC_BSVIE, OTGSC_BSVIE);
+	}
+
+	return 0;
+}