1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/otg/hardware/arc-ocd.c b/drivers/otg/hardware/arc-ocd.c
new file mode 100644
index 000000000000..d2f9b5261425
--- /dev/null
+++ b/drivers/otg/hardware/arc-ocd.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+/*
+ * otg/hardware/arc-ocd.c -- Generic Linux 2.6 Timer
+ * @(#) sl@belcarra.com/whiskey.enposte.net|otg/platform/arc/arc-ocd.c|20070612232808|00655
+ *
+ *      Copyright (c) 2005-2007 Belcarra Technologies 2005 Corp
+ *
+ * By:
+ *      Shahrad Payandeh Lynne <sp@lbelcarra.com>,
+ *      Stuart Lynne <sl@belcarra.com>
+ *
+ */
+/*!
+ * @file otg/hardware/arc-ocd.c
+ * @brief Belcarra Freescale ARC Device driver.
+ *
+ * Provides ticks via gettimeofday() and optional a OTG timer
+ * using high resolution timer.
+ *
+ * CONFIG_HIGH_RES_TIMERS=y
+ *
+ *     Optionally provides accurate OTG timer using Linux High
+ *     Resolution Timer.
+ *
+ * CONFIG_HIGH_RES_TIMERS=n
+ *
+ *     Start timer is a dummy if High Resolution Timers not
+ *     enabled.
+ *
+ * @ingroup ARC
+ * @ingroup OCD
+ * @ingroup OTGDEV
+ * @ingroup LINUXOS
+ */
+
+
+#include <otg/pcd-include.h>
+#include <otg/otg-dev.h>
+
+#include "arc-hardware.h"
+
+//#warning NEED CONDITIONAL for imx-regs.h
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/time.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/leds.h>
+#include <asm/irq.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+
+#define MXC_GPT_GPTCNT          (IO_ADDRESS(GPT1_BASE_ADDR + 0x24))
+
+
+
+/* ********************************************************************************************* */
+
+/*!
+ * arc_ocd_start_timer() - start a timer for otg state machine
+ * Set or reset timer to interrupt in number of uS (micro-seconds).
+ *
+ * @param otg
+ * @param usec
+ */
+int arc_ocd_start_timer(struct otg_instance *otg, int usec)
+{
+        otg_event(otg, TMOUT, otg->ocd->TAG, "l26 Timer - FAKE TMOUT");
+        return 0;
+}
+
+/* arc_ocd_ticks - get current ticks
+ */
+otg_tick_t arc_ocd_ticks (void)
+{
+        unsigned long ticks = 0;
+
+        ticks = __raw_readl(MXC_GPT_GPTCNT);
+
+        return (otg_tick_t) ticks;
+}
+
+/* arc_ocd_elapsed - return micro-seconds between two tick values
+ */
+otg_tick_t arc_ocd_elapsed(otg_tick_t *t1, otg_tick_t *t2)
+{
+        otg_tick_t ticks = (((*t1 > *t2) ? (*t1 - *t2) : (*t2 - *t1)));
+        //return (otg_tick_t) ticks / 16; // 381 vs 367
+        //return (otg_tick_t) (ticks * 2) / 31; // 201 vs 188
+        return (otg_tick_t) ticks / 17;  // 185 vs 189
+}
+
+
+struct ocd_ops arc_ocd_ops = {
+        .start_timer = arc_ocd_start_timer,
+        .ticks = arc_ocd_ticks,
+        .elapsed = arc_ocd_elapsed,
+};
+
+
+static void
+arc_ocd_dev_remove(struct otg_dev *otg_dev)
+{
+}
+
+static int
+arc_ocd_dev_probe(struct otg_dev *otg_dev)
+{
+        return 0;
+}
+
+
+/* ********************************************************************************************* */
+static struct otg_dev_driver arc_ocd_driver = {
+        .name =         "arc_udc",
+        .id =           OTG_DRIVER_OCD,
+
+        .probe =        arc_ocd_dev_probe,
+        .remove =       arc_ocd_dev_remove,
+
+        .ops =          &arc_ocd_ops,
+};
+
+/* ********************************************************************************************* */
+
+/*! arc_ocd_module_init() - module init
+ */
+int arc_ocd_module_init (struct otg_device_driver *otg_device_driver)
+{
+        printk(KERN_INFO"%s:\n", __FUNCTION__);
+        return otg_dev_register_driver(otg_device_driver, &arc_ocd_driver);
+}
+
+/*!
+ * arc_ocd_module_exit() - module exit
+ */
+void arc_ocd_module_exit (struct otg_device_driver *otg_device_driver)
+{
+        printk(KERN_INFO"%s:\n", __FUNCTION__);
+        otg_dev_unregister_driver (otg_device_driver, &arc_ocd_driver);
+}