s5pc110: copy&paste S3C UDC OTG driver from Linux Kernel tree
authorKyungmin Park <kyungmin.park@samsung.com>
Thu, 18 Feb 2010 07:50:51 +0000 (16:50 +0900)
committerKyungmin Park <kyungmin.park@samsung.com>
Thu, 18 Feb 2010 07:50:51 +0000 (16:50 +0900)
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
drivers/usb/gadget/s3c_udc.h [new file with mode: 0644]
drivers/usb/gadget/s3c_udc_otg.c [new file with mode: 0644]
drivers/usb/gadget/s3c_udc_otg_xfer_dma.c [new file with mode: 0644]

diff --git a/drivers/usb/gadget/s3c_udc.h b/drivers/usb/gadget/s3c_udc.h
new file mode 100644 (file)
index 0000000..40cc18a
--- /dev/null
@@ -0,0 +1,150 @@
+/*
+ * drivers/usb/gadget/s3c_udc.h
+ * Samsung S3C on-chip full/high speed USB device controllers
+ * Copyright (C) 2005 for Samsung Electronics 
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#ifndef __S3C_USB_GADGET
+#define __S3C_USB_GADGET
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/regulator/consumer.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+//#include <asm/hardware.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#define DMA_BUFFER_SIZE                (4096*4)        /* DMA bounce buffer size, 16K is enough even for mass storage */
+
+// Max packet size
+#if defined(CONFIG_USB_GADGET_S3C_FS)
+#define EP0_FIFO_SIZE          8
+#define EP_FIFO_SIZE           64
+#define S3C_MAX_ENDPOINTS      5
+#elif defined(CONFIG_USB_GADGET_S3C_HS) || defined(CONFIG_PLAT_S5P64XX) || defined(CONFIG_PLAT_S5PC1XX) \
+       || defined(CONFIG_CPU_S5P6442)
+#define EP0_FIFO_SIZE          64
+#define EP_FIFO_SIZE           512
+#define EP_FIFO_SIZE2          1024
+#define S3C_MAX_ENDPOINTS      16
+#else
+#define EP0_FIFO_SIZE          64
+#define EP_FIFO_SIZE           512
+#define EP_FIFO_SIZE2          1024
+#define S3C_MAX_ENDPOINTS      16
+#endif
+
+#define WAIT_FOR_SETUP          0
+#define DATA_STATE_XMIT         1
+#define DATA_STATE_NEED_ZLP     2
+#define WAIT_FOR_OUT_STATUS     3
+#define DATA_STATE_RECV         4
+#define WAIT_FOR_COMPLETE      5
+#define RegReadErr             6
+#define FAIL_TO_SETUP          7
+
+#define TEST_J_SEL             0x1
+#define TEST_K_SEL             0x2
+#define TEST_SE0_NAK_SEL       0x3
+#define TEST_PACKET_SEL                0x4
+#define TEST_FORCE_ENABLE_SEL  0x5
+
+/* ********************************************************************************************* */
+/* IO
+ */
+
+typedef enum ep_type {
+       ep_control, ep_bulk_in, ep_bulk_out, ep_interrupt
+} ep_type_t;
+
+struct s3c_ep {
+       struct usb_ep ep;
+       struct s3c_udc *dev;
+
+       const struct usb_endpoint_descriptor *desc;
+       struct list_head queue;
+       unsigned long pio_irqs;
+       int len;
+       void *dma_buf;
+
+       u8 stopped;
+       u8 bEndpointAddress;
+       u8 bmAttributes;
+
+       ep_type_t ep_type;
+       int fifo_num;
+#ifdef CONFIG_USB_GADGET_S3C_FS
+       u32 csr1;
+       u32 csr2;
+#endif
+};
+
+struct s3c_request {
+       struct usb_request req;
+       struct list_head queue;
+};
+
+struct s3c_udc {
+       struct usb_gadget gadget;
+       struct usb_gadget_driver *driver;
+       //struct device *dev;
+       struct platform_device *dev;
+       spinlock_t lock;
+       void *dma_buf[S3C_MAX_ENDPOINTS+1];
+
+       int ep0state;
+       struct s3c_ep ep[S3C_MAX_ENDPOINTS];
+
+       unsigned char usb_address;
+
+       struct regulator *regulator_a;
+       struct regulator *regulator_d;
+
+       unsigned req_pending:1, req_std:1, req_config:1;
+};
+
+extern struct s3c_udc *the_controller;
+
+#define ep_is_in(EP)           (((EP)->bEndpointAddress&USB_DIR_IN)==USB_DIR_IN)
+#define ep_index(EP)           ((EP)->bEndpointAddress&0xF)
+#define ep_maxpacket(EP)       ((EP)->ep.maxpacket)
+
+#endif
diff --git a/drivers/usb/gadget/s3c_udc_otg.c b/drivers/usb/gadget/s3c_udc_otg.c
new file mode 100644 (file)
index 0000000..0353027
--- /dev/null
@@ -0,0 +1,1363 @@
+/*
+ * drivers/usb/gadget/s3c_udc_otg.c
+ * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
+ *
+ * Copyright (C) 2008 for Samsung Electronics
+ *
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "s3c_udc.h"
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <mach/map.h>
+#include "s3c_udc-regs-otg.h"
+#include <plat/regs-sys.h>
+#include <plat/regs-clock.h>
+
+
+void __iomem           *regs_otg;
+void __iomem           *regs_phy;
+struct resource                *res_otg;
+struct resource                *res_phy;
+
+/* Initializes OTG Phy. */
+void otg_phy_init(void)
+{
+       printk("otg phy init: regs %08x, phy %08x\n", (u32)regs_otg, (u32)regs_phy);
+
+       /*USB PHY0 Enable */
+//     writel(readl(S5P_USB_PHY_CONTROL)|(0x1<<0), S5P_USB_PHY_CONTROL);
+       writel(readl(S5PC110_USB_PHY_CON)|(0x1<<0), S5PC110_USB_PHY_CON);
+       writel((readl(S3C_USBOTG_PHYPWR)&~(0x3<<3)&~(0x1<<0))|(0x1<<5),
+                       S3C_USBOTG_PHYPWR);
+       writel((readl(S3C_USBOTG_PHYCLK)&~(0x5<<2))|(0x3<<0),
+                       S3C_USBOTG_PHYCLK);
+       writel((readl(S3C_USBOTG_RSTCON)&~(0x3<<1))|(0x1<<0),
+                       S3C_USBOTG_RSTCON);
+       udelay(10);
+       writel(readl(S3C_USBOTG_RSTCON)&~(0x7<<0), S3C_USBOTG_RSTCON);
+       udelay(10);
+
+       printk("otg phy init done\n");
+
+}
+EXPORT_SYMBOL(otg_phy_init);
+
+/* OTG PHY Power Off */
+void otg_phy_off(void)
+{
+       printk("otg phy off\n");
+       writel(readl(S3C_USBOTG_PHYPWR)|(0x3<<3), S3C_USBOTG_PHYPWR);
+       writel(readl(S5PC110_USB_PHY_CON)&~(1<<0), S5PC110_USB_PHY_CON);
+//     writel(readl(S5P_USB_PHY_CONTROL)&~(1<<0), S5P_USB_PHY_CONTROL);
+       printk("otg phy off done\n");
+}
+EXPORT_SYMBOL(otg_phy_off);
+
+
+#if    defined(CONFIG_USB_GADGET_S3C_OTGD_DMA_MODE) /* DMA mode */
+#define OTG_DMA_MODE           1
+
+#elif  defined(CONFIG_USB_GADGET_S3C_OTGD_SLAVE_MODE) /* Slave mode */
+#define OTG_DMA_MODE           0
+#error " Slave Mode is not implemented to do later"
+#else
+#error " Unknown S3C OTG operation mode, Select a correct operation mode"
+#endif
+
+#undef DEBUG_S3C_UDC_SETUP
+#undef DEBUG_S3C_UDC_EP0
+#undef DEBUG_S3C_UDC_ISR
+#undef DEBUG_S3C_UDC_OUT_EP
+#undef DEBUG_S3C_UDC_IN_EP
+#undef DEBUG_S3C_UDC
+
+#define DEBUG_S3C_UDC_SETUP
+#define DEBUG_S3C_UDC_EP0
+//#define DEBUG_S3C_UDC_ISR
+//#define DEBUG_S3C_UDC_OUT_EP
+//#define DEBUG_S3C_UDC_IN_EP
+#define DEBUG_S3C_UDC
+
+#define EP0_CON                0
+#define EP_MASK                0xF
+
+#if defined(DEBUG_S3C_UDC_SETUP) || defined(DEBUG_S3C_UDC_ISR)\
+       || defined(DEBUG_S3C_UDC_OUT_EP)
+
+static char *state_names[] = {
+       "WAIT_FOR_SETUP",
+       "DATA_STATE_XMIT",
+       "DATA_STATE_NEED_ZLP",
+       "WAIT_FOR_OUT_STATUS",
+       "DATA_STATE_RECV",
+       "WAIT_FOR_COMPLETE",
+       };
+#endif
+
+#ifdef DEBUG_S3C_UDC_SETUP
+#define DEBUG_SETUP(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG_SETUP(fmt,args...) do {} while(0)
+#endif
+
+#ifdef DEBUG_S3C_UDC_EP0
+#define DEBUG_EP0(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG_EP0(fmt,args...) do {} while(0)
+#endif
+
+#ifdef DEBUG_S3C_UDC
+#define DEBUG(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG(fmt,args...) do {} while(0)
+#endif
+
+#ifdef DEBUG_S3C_UDC_ISR
+#define DEBUG_ISR(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG_ISR(fmt,args...) do {} while(0)
+#endif
+
+#ifdef DEBUG_S3C_UDC_OUT_EP
+#define DEBUG_OUT_EP(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG_OUT_EP(fmt,args...) do {} while(0)
+#endif
+
+#ifdef DEBUG_S3C_UDC_IN_EP
+#define DEBUG_IN_EP(fmt,args...) printk(fmt, ##args)
+#else
+#define DEBUG_IN_EP(fmt,args...) do {} while(0)
+#endif
+
+
+#define        DRIVER_DESC             "S3C HS USB OTG Device Driver, (c) 2008-2009 Samsung Electronics"
+#define        DRIVER_VERSION          "15 March 2009"
+
+struct s3c_udc *the_controller;
+
+static const char driver_name[] = "s3c-udc";
+static const char driver_desc[] = DRIVER_DESC;
+static const char ep0name[] = "ep0-control";
+
+/* Max packet size*/
+static unsigned int ep0_fifo_size = 64;
+static unsigned int ep_fifo_size =  512;
+static unsigned int ep_fifo_size2 = 1024;
+static int reset_available = 1;
+
+extern void otg_phy_init(void);
+extern void otg_phy_off(void);
+static struct usb_ctrlrequest *usb_ctrl;
+
+/*
+  Local declarations.
+*/
+static int s3c_ep_enable(struct usb_ep *ep, const struct usb_endpoint_descriptor *);
+static int s3c_ep_disable(struct usb_ep *ep);
+static struct usb_request *s3c_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
+static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
+
+static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
+static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
+static int s3c_fifo_status(struct usb_ep *ep);
+static void s3c_fifo_flush(struct usb_ep *ep);
+static void s3c_ep0_read(struct s3c_udc *dev);
+static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
+static void s3c_handle_ep0(struct s3c_udc *dev);
+static int s3c_ep0_write(struct s3c_udc *dev);
+static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
+static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
+static void stop_activity(struct s3c_udc *dev, struct usb_gadget_driver *driver);
+static int udc_enable(struct s3c_udc *dev);
+static void udc_set_address(struct s3c_udc *dev, unsigned char address);
+static void reconfig_usbd(void);
+static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
+static void nuke(struct s3c_ep *ep, int status);
+static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
+
+static struct usb_ep_ops s3c_ep_ops = {
+       .enable = s3c_ep_enable,
+       .disable = s3c_ep_disable,
+
+       .alloc_request = s3c_alloc_request,
+       .free_request = s3c_free_request,
+
+       .queue = s3c_queue,
+       .dequeue = s3c_dequeue,
+
+       .set_halt = s3c_udc_set_halt,
+       .fifo_status = s3c_fifo_status,
+       .fifo_flush = s3c_fifo_flush,
+};
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static const char proc_node_name[] = "driver/udc";
+
+static int
+udc_proc_read(char *page, char **start, off_t off, int count,
+             int *eof, void *_dev)
+{
+       char *buf = page;
+       struct s3c_udc *dev = _dev;
+       char *next = buf;
+       unsigned size = count;
+       unsigned long flags;
+       int t;
+
+       if (off != 0)
+               return 0;
+
+       local_irq_save(flags);
+
+       /* basic device status */
+       t = scnprintf(next, size,
+                     DRIVER_DESC "\n"
+                     "%s version: %s\n"
+                     "Gadget driver: %s\n"
+                     "\n",
+                     driver_name, DRIVER_VERSION,
+                     dev->driver ? dev->driver->driver.name : "(none)");
+       size -= t;
+       next += t;
+
+       local_irq_restore(flags);
+       *eof = 1;
+       return count - size;
+}
+
+#define create_proc_files() \
+       create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
+#define remove_proc_files() \
+       remove_proc_entry(proc_node_name, NULL)
+
+#else  /* !CONFIG_USB_GADGET_DEBUG_FILES */
+
+#define create_proc_files() do {} while (0)
+#define remove_proc_files() do {} while (0)
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+#if    OTG_DMA_MODE /* DMA Mode */
+#include "s3c_udc_otg_xfer_dma.c"
+
+#else  /* Slave Mode */
+#include "s3c_udc_otg_xfer_slave.c"
+#endif
+
+/*
+ *     udc_disable - disable USB device controller
+ */
+static void udc_disable(struct s3c_udc *dev)
+{
+       DEBUG_SETUP("%s: %p\n", __FUNCTION__, dev);
+
+       udc_set_address(dev, 0);
+
+       dev->ep0state = WAIT_FOR_SETUP;
+       dev->gadget.speed = USB_SPEED_UNKNOWN;
+       dev->usb_address = 0;
+
+       otg_phy_off();
+}
+
+/*
+ *     udc_reinit - initialize software state
+ */
+static void udc_reinit(struct s3c_udc *dev)
+{
+       unsigned int i;
+
+       DEBUG_SETUP("%s: %p\n", __FUNCTION__, dev);
+
+       /* device/ep0 records init */
+       INIT_LIST_HEAD(&dev->gadget.ep_list);
+       INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
+       dev->ep0state = WAIT_FOR_SETUP;
+
+       /* basic endpoint records init */
+       for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
+               struct s3c_ep *ep = &dev->ep[i];
+
+               if (i != 0)
+                       list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
+
+               ep->desc = 0;
+               ep->stopped = 0;
+               INIT_LIST_HEAD(&ep->queue);
+               ep->pio_irqs = 0;
+       }
+
+       /* the rest was statically initialized, and is read-only */
+}
+
+#define BYTES2MAXP(x)  (x / 8)
+#define MAXP2BYTES(x)  (x * 8)
+
+/* until it's enabled, this UDC should be completely invisible
+ * to any USB host.
+ */
+static int udc_enable(struct s3c_udc *dev)
+{
+       DEBUG_SETUP("%s: %p\n", __FUNCTION__, dev);
+
+       otg_phy_init();
+       reconfig_usbd();
+
+       DEBUG_SETUP("S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
+                       readl(S3C_UDC_OTG_GINTMSK));
+
+       dev->gadget.speed = USB_SPEED_UNKNOWN;
+
+       return 0;
+}
+
+/*
+  Register entry point for the peripheral controller driver.
+*/
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+       struct s3c_udc *dev = the_controller;
+       int retval;
+       unsigned long flags;
+
+       DEBUG_SETUP("%s: %s\n", __FUNCTION__, driver->driver.name);
+
+        if (!driver
+            || (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH)
+            || !driver->bind || !driver->disconnect || !driver->setup)
+                return -EINVAL;
+       if (!dev)
+               return -ENODEV;
+       if (dev->driver)
+               return -EBUSY;
+
+       spin_lock_irqsave(&dev->lock, flags);
+/*     if (!dev->regulator_a) {
+               dev->regulator_a = regulator_get(&dev->dev->dev, "vusb_a");
+               if (IS_ERR(dev->regulator_a)) {
+                       dev_info(&dev->dev->dev, "No VDD_USB_A regualtor\n");
+                       dev->regulator_a = NULL;
+               } else
+                       regulator_enable(dev->regulator_a);
+       }
+
+       if (!dev->regulator_d) {
+               dev->regulator_d = regulator_get(&dev->dev->dev, "vusb_d");
+               if (IS_ERR(dev->regulator_d)) {
+                       dev_info(&dev->dev->dev, "No VDD_USB_D regualtor\n");
+                       dev->regulator_d = NULL;
+               } else
+                       regulator_enable(dev->regulator_d);
+       }
+*/
+       /* first hook up the driver ... */
+       dev->driver = driver;
+       dev->gadget.dev.driver = &driver->driver;
+       spin_unlock_irqrestore(&dev->lock, flags);
+       retval = device_add(&dev->gadget.dev);
+
+       if(retval) { /* TODO */
+               printk("target device_add failed, error %d\n", retval);
+               return retval;
+       }
+
+       retval = driver->bind(&dev->gadget);
+       if (retval) {
+               printk("%s: bind to driver %s --> error %d\n", dev->gadget.name,
+                      driver->driver.name, retval);
+               device_del(&dev->gadget.dev);
+
+               dev->driver = 0;
+               dev->gadget.dev.driver = 0;
+               return retval;
+       }
+
+       enable_irq(IRQ_OTG);
+
+       printk("Registered gadget driver '%s'\n", driver->driver.name);
+       udc_enable(dev);
+
+       return 0;
+}
+
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+/*
+  Unregister entry point for the peripheral controller driver.
+*/
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+       struct s3c_udc *dev = the_controller;
+       unsigned long flags;
+
+       if (!dev)
+               return -ENODEV;
+       if (!driver || driver != dev->driver)
+               return -EINVAL;
+
+       spin_lock_irqsave(&dev->lock, flags);
+       dev->driver = 0;
+       stop_activity(dev, driver);
+       spin_unlock_irqrestore(&dev->lock, flags);
+
+       driver->unbind(&dev->gadget);
+       device_del(&dev->gadget.dev);
+
+       disable_irq(IRQ_OTG);
+
+       printk("Unregistered gadget driver '%s'\n", driver->driver.name);
+
+       udc_disable(dev);
+
+       if (!IS_ERR(dev->regulator_a)) {
+               regulator_disable(dev->regulator_a);
+               regulator_put(dev->regulator_a);
+               dev->regulator_a = NULL;
+       }
+       if (!IS_ERR(dev->regulator_d)) {
+               regulator_disable(dev->regulator_d);
+               regulator_put(dev->regulator_d);
+               dev->regulator_d = NULL;
+       }
+
+       return 0;
+}
+
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+/*
+ *     done - retire a request; caller blocked irqs
+ */
+static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
+{
+       unsigned int stopped = ep->stopped;
+
+       DEBUG("%s: %s %p, req = %p, stopped = %d\n",
+               __FUNCTION__, ep->ep.name, ep, &req->req, stopped);
+
+       list_del_init(&req->queue);
+
+       if (likely(req->req.status == -EINPROGRESS)) {
+               req->req.status = status;
+       } else {
+               status = req->req.status;
+       }
+
+       if (status && status != -ESHUTDOWN) {
+               DEBUG("complete %s req %p stat %d len %u/%u\n",
+                       ep->ep.name, &req->req, status,
+                       req->req.actual, req->req.length);
+       }
+
+       /* don't modify queue heads during completion callback */
+       ep->stopped = 1;
+
+       spin_unlock(&ep->dev->lock);
+       req->req.complete(&ep->ep, &req->req);
+       spin_lock(&ep->dev->lock);
+
+       ep->stopped = stopped;
+}
+
+/*
+ *     nuke - dequeue ALL requests
+ */
+static void nuke(struct s3c_ep *ep, int status)
+{
+       struct s3c_request *req;
+
+       DEBUG("%s: %s %p\n", __FUNCTION__, ep->ep.name, ep);
+
+       /* called with irqs blocked */
+       while (!list_empty(&ep->queue)) {
+               req = list_entry(ep->queue.next, struct s3c_request, queue);
+               done(ep, req, status);
+       }
+}
+
+static void stop_activity(struct s3c_udc *dev,
+                         struct usb_gadget_driver *driver)
+{
+       int i;
+
+       /* don't disconnect drivers more than once */
+       if (dev->gadget.speed == USB_SPEED_UNKNOWN)
+               driver = 0;
+       dev->gadget.speed = USB_SPEED_UNKNOWN;
+
+       /* prevent new request submissions, kill any outstanding requests  */
+       for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
+               struct s3c_ep *ep = &dev->ep[i];
+               ep->stopped = 1;
+               nuke(ep, -ESHUTDOWN);
+       }
+
+       /* report disconnect; the driver is already quiesced */
+       if (driver) {
+               spin_unlock(&dev->lock);
+               driver->disconnect(&dev->gadget);
+               spin_lock(&dev->lock);
+       }
+
+       /* re-init driver-visible data structures */
+       udc_reinit(dev);
+}
+
+static void reconfig_usbd(void)
+{
+       /* 2. Soft-reset OTG Core and then unreset again. */
+       int i;
+       unsigned int uTemp = writel(CORE_SOFT_RESET, S3C_UDC_OTG_GRSTCTL);
+
+       writel( 0<<15           /* PHY Low Power Clock sel*/
+               |1<<14          /* Non-Periodic TxFIFO Rewind Enable*/
+               |0x5<<10        /* Turnaround time*/
+               |0<<9|0<<8      /* [0:HNP disable, 1:HNP enable][ 0:SRP disable, 1:SRP enable] H1= 1,1*/
+               |0<<7           /* Ulpi DDR sel*/
+               |0<<6           /* 0: high speed utmi+, 1: full speed serial*/
+               |0<<4           /* 0: utmi+, 1:ulpi*/
+               |1<<3           /* phy i/f  0:8bit, 1:16bit*/
+               |0x7<<0,        /* HS/FS Timeout**/
+               S3C_UDC_OTG_GUSBCFG);
+
+       /* 3. Put the OTG device core in the disconnected state.*/
+       uTemp = readl(S3C_UDC_OTG_DCTL);
+       uTemp |= SOFT_DISCONNECT;
+       writel(uTemp, S3C_UDC_OTG_DCTL);
+
+       udelay(20);
+
+       /* 4. Make the OTG device core exit from the disconnected state.*/
+       uTemp = readl(S3C_UDC_OTG_DCTL);
+       uTemp = uTemp & ~SOFT_DISCONNECT;
+       writel(uTemp, S3C_UDC_OTG_DCTL);
+
+       /* 5. Configure OTG Core to initial settings of device mode.*/
+       writel(1<<18|0x0<<0, S3C_UDC_OTG_DCFG);         /* [][1: full speed(30Mhz) 0:high speed]*/
+
+       mdelay(1);
+
+       /* 6. Unmask the core interrupts*/
+       writel(GINTMSK_INIT, S3C_UDC_OTG_GINTMSK);
+
+       /* 7. Set NAK bit of EP0, EP1, EP2*/
+       writel(DEPCTL_EPDIS|DEPCTL_SNAK|(0<<0), S3C_UDC_OTG_DOEPCTL(EP0_CON));
+       writel(DEPCTL_EPDIS|DEPCTL_SNAK|(0<<0), S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+       /* 8. Unmask EPO interrupts*/
+       writel( ((1<<EP0_CON)<<DAINT_OUT_BIT)|(1<<EP0_CON), S3C_UDC_OTG_DAINTMSK);
+
+       /* 9. Unmask device OUT EP common interrupts*/
+       writel(DOEPMSK_INIT, S3C_UDC_OTG_DOEPMSK);
+
+       /* 10. Unmask device IN EP common interrupts*/
+       writel(DIEPMSK_INIT, S3C_UDC_OTG_DIEPMSK);
+
+       /* 11. Set Rx FIFO Size (in 32-bit words) */
+       writel(RX_FIFO_SIZE >> 2, S3C_UDC_OTG_GRXFSIZ);
+       
+       /* 12. Set Non Periodic Tx FIFO Size*/
+       writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
+               S3C_UDC_OTG_GNPTXFSIZ);
+
+       for (i = 1; i < S3C_MAX_ENDPOINTS; i++) 
+               writel((PTX_FIFO_SIZE >> 2) << 16 |
+                       ((RX_FIFO_SIZE + NPTX_FIFO_SIZE + PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
+                       S3C_UDC_OTG_DIEPTXF(i));
+
+/* check if defined tx fifo sizes fits in SPRAM (S5PC110 fifo has 7936 entries */
+#if (((RX_FIFO_SIZE + NPTX_FIFO_SIZE + PTX_FIFO_SIZE*(S3C_MAX_ENDPOINTS-1)) >> 2) >= 7936)
+#error Too large tx fifo size defined!
+#endif
+
+        /* Flush the RX FIFO */
+        writel(0x10, S3C_UDC_OTG_GRSTCTL);
+        while(readl(S3C_UDC_OTG_GRSTCTL) & 0x10);
+
+        /* Flush all the Tx FIFO's */
+        writel(0x10<<6, S3C_UDC_OTG_GRSTCTL);
+        writel((0x10<<6)|0x20, S3C_UDC_OTG_GRSTCTL);
+        while(readl(S3C_UDC_OTG_GRSTCTL) & 0x20);
+
+       /* 13. Clear NAK bit of EP0, EP1, EP2*/
+       /* For Slave mode*/
+       writel(DEPCTL_EPDIS|DEPCTL_CNAK|(0<<0), S3C_UDC_OTG_DOEPCTL(EP0_CON)); /* EP0: Control OUT */
+
+       /* 14. Initialize OTG Link Core.*/
+       writel(GAHBCFG_INIT, S3C_UDC_OTG_GAHBCFG);
+}
+
+static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
+{
+       unsigned int ep_ctrl;
+       int i;
+
+       if (speed == USB_SPEED_HIGH) {
+               ep0_fifo_size = 64;
+               ep_fifo_size = 512;
+               ep_fifo_size2 = 1024;
+               dev->gadget.speed = USB_SPEED_HIGH;
+       } else {
+               ep0_fifo_size = 64;
+               ep_fifo_size = 64;
+               ep_fifo_size2 = 64;
+               dev->gadget.speed = USB_SPEED_FULL;
+       }
+
+       dev->ep[0].ep.maxpacket = ep0_fifo_size;
+       for(i = 1; i < S3C_MAX_ENDPOINTS; i++)
+               dev->ep[i].ep.maxpacket = ep_fifo_size;
+
+       /* EP0 - Control IN (64 bytes)*/
+       ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+       writel(ep_ctrl|(0<<0), S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+       /* EP0 - Control OUT (64 bytes)*/
+       ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(EP0_CON));
+       writel(ep_ctrl|(0<<0), S3C_UDC_OTG_DOEPCTL(EP0_CON));
+}
+
+static int s3c_ep_enable(struct usb_ep *_ep,
+                            const struct usb_endpoint_descriptor *desc)
+{
+       struct s3c_ep *ep;
+       struct s3c_udc *dev;
+       unsigned long flags;
+
+       DEBUG("%s: %p\n", __FUNCTION__, _ep);
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       if (!_ep || !desc || ep->desc || _ep->name == ep0name
+           || desc->bDescriptorType != USB_DT_ENDPOINT
+           || ep->bEndpointAddress != desc->bEndpointAddress
+           || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
+
+               DEBUG("%s: bad ep or descriptor\n", __FUNCTION__);
+               return -EINVAL;
+       }
+
+       /* xfer types must match, except that interrupt ~= bulk */
+       if (ep->bmAttributes != desc->bmAttributes
+           && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
+           && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
+
+               DEBUG("%s: %s type mismatch\n", __FUNCTION__, _ep->name);
+               return -EINVAL;
+       }
+
+       /* hardware _could_ do smaller, but driver doesn't */
+       if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
+            && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
+           || !desc->wMaxPacketSize) {
+
+               DEBUG("%s: bad %s maxpacket\n", __FUNCTION__, _ep->name);
+               return -ERANGE;
+       }
+
+       dev = ep->dev;
+       if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
+
+               DEBUG("%s: bogus device state\n", __FUNCTION__);
+               return -ESHUTDOWN;
+       }
+
+       ep->stopped = 0;
+       ep->desc = desc;
+       ep->pio_irqs = 0;
+       ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+
+       /* Reset halt state */
+       s3c_udc_set_halt(_ep, 0);
+
+       spin_lock_irqsave(&ep->dev->lock, flags);
+       s3c_udc_ep_activate(ep);
+       spin_unlock_irqrestore(&ep->dev->lock, flags);
+
+       DEBUG("%s: enabled %s, stopped = %d, maxpacket = %d\n",
+               __FUNCTION__, _ep->name, ep->stopped, ep->ep.maxpacket);
+       return 0;
+}
+
+/** Disable EP
+ */
+static int s3c_ep_disable(struct usb_ep *_ep)
+{
+       struct s3c_ep *ep;
+       unsigned long flags;
+
+       DEBUG("%s: %p\n", __FUNCTION__, _ep);
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       if (!_ep || !ep->desc) {
+               DEBUG("%s: %s not enabled\n", __FUNCTION__,
+                     _ep ? ep->ep.name : NULL);
+               return -EINVAL;
+       }
+
+       spin_lock_irqsave(&ep->dev->lock, flags);
+
+       /* Nuke all pending requests */
+       nuke(ep, -ESHUTDOWN);
+
+       ep->desc = 0;
+       ep->stopped = 1;
+
+       spin_unlock_irqrestore(&ep->dev->lock, flags);
+
+       DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
+       return 0;
+}
+
+static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
+                                                gfp_t gfp_flags)
+{
+       struct s3c_request *req;
+
+       DEBUG("%s: %s %p\n", __FUNCTION__, ep->name, ep);
+
+       req = kmalloc(sizeof *req, gfp_flags);
+       if (!req)
+               return 0;
+
+       memset(req, 0, sizeof *req);
+       INIT_LIST_HEAD(&req->queue);
+
+       return &req->req;
+}
+
+static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
+{
+       struct s3c_request *req;
+
+       DEBUG("%s: %p\n", __FUNCTION__, ep);
+
+       req = container_of(_req, struct s3c_request, req);
+       WARN_ON(!list_empty(&req->queue));
+       kfree(req);
+}
+
+/* dequeue JUST ONE request */
+static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+       struct s3c_ep *ep;
+       struct s3c_request *req;
+       unsigned long flags;
+
+       DEBUG("%s: %p\n", __FUNCTION__, _ep);
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       if (!_ep || ep->ep.name == ep0name)
+               return -EINVAL;
+
+       spin_lock_irqsave(&ep->dev->lock, flags);
+
+       /* make sure it's actually queued on this endpoint */
+       list_for_each_entry(req, &ep->queue, queue) {
+               if (&req->req == _req)
+                       break;
+       }
+       if (&req->req != _req) {
+               spin_unlock_irqrestore(&ep->dev->lock, flags);
+               return -EINVAL;
+       }
+
+       done(ep, req, -ECONNRESET);
+
+       spin_unlock_irqrestore(&ep->dev->lock, flags);
+       return 0;
+}
+
+/** Return bytes in EP FIFO
+ */
+static int s3c_fifo_status(struct usb_ep *_ep)
+{
+       int count = 0;
+       struct s3c_ep *ep;
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       if (!_ep) {
+               DEBUG("%s: bad ep\n", __FUNCTION__);
+               return -ENODEV;
+       }
+
+       DEBUG("%s: %d\n", __FUNCTION__, ep_index(ep));
+
+       /* LPD can't report unclaimed bytes from IN fifos */
+       if (ep_is_in(ep))
+               return -EOPNOTSUPP;
+
+       return count;
+}
+
+/** Flush EP FIFO
+ */
+static void s3c_fifo_flush(struct usb_ep *_ep)
+{
+       struct s3c_ep *ep;
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+               DEBUG("%s: bad ep\n", __FUNCTION__);
+               return;
+       }
+
+       DEBUG("%s: %d\n", __FUNCTION__, ep_index(ep));
+}
+
+/* ---------------------------------------------------------------------------
+ *     device-scoped parts of the api to the usb controller hardware
+ * ---------------------------------------------------------------------------
+ */
+
+static int s3c_udc_get_frame(struct usb_gadget *_gadget)
+{
+       /*fram count number [21:8]*/
+       unsigned int frame = readl(S3C_UDC_OTG_DSTS);
+
+       DEBUG("%s: %p\n", __FUNCTION__, _gadget);
+       return (frame & 0x3ff00);
+}
+
+static int s3c_udc_wakeup(struct usb_gadget *_gadget)
+{
+       DEBUG("%s: %p\n", __FUNCTION__, _gadget);
+       return -ENOTSUPP;
+}
+
+static const struct usb_gadget_ops s3c_udc_ops = {
+       .get_frame = s3c_udc_get_frame,
+       .wakeup = s3c_udc_wakeup,
+       /* current versions must always be self-powered */
+};
+
+static void nop_release(struct device *dev)
+{
+//     DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
+}
+
+static struct s3c_udc memory = {
+       .usb_address = 0,
+
+       .gadget = {
+                  .ops = &s3c_udc_ops,
+                  .ep0 = &memory.ep[0].ep,
+                  .name = driver_name,
+                  .dev = {
+                          .init_name = "gadget",
+                          .release = nop_release,
+                          },
+                  },
+
+       /* control endpoint */
+       .ep[0] = {
+                 .ep = {
+                        .name = ep0name,
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP0_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = 0,
+                 .bmAttributes = 0,
+
+                 .ep_type = ep_control,
+                 },
+
+       /* first group of endpoints */
+       .ep[1] = {
+                 .ep = {
+                        .name = "ep1out-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_OUT | 1,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_out,
+                 .fifo_num = 1,
+                 },
+
+       .ep[2] = {
+                 .ep = {
+                        .name = "ep2in-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 2,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_in,
+                 .fifo_num = 2,
+                 },
+
+       .ep[3] = {
+                 .ep = {
+                        .name = "ep3in-int",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 3,
+                 .bmAttributes = USB_ENDPOINT_XFER_INT,
+
+                 .ep_type = ep_interrupt,
+                 .fifo_num = 3,
+                 },
+       .ep[4] = {
+                 .ep = {
+                        .name = "ep4out-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_OUT | 4,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_out,
+                 .fifo_num = 4,
+                 },
+       .ep[5] = {
+                 .ep = {
+                        .name = "ep5in-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 5,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_in,
+                 .fifo_num = 5,
+                 },
+       .ep[6] = {
+                 .ep = {
+                        .name = "ep6in-int",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 6,
+                 .bmAttributes = USB_ENDPOINT_XFER_INT,
+
+                 .ep_type = ep_interrupt,
+                 .fifo_num = 6,
+                 },
+       .ep[7] = {
+                 .ep = {
+                        .name = "ep7out-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_OUT | 7,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_out,
+                 .fifo_num = 7,
+                 },
+       .ep[8] = {
+                 .ep = {
+                        .name = "ep8in-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 8,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_in,
+                 .fifo_num = 8,
+                 },
+       .ep[9] = {
+                 .ep = {
+                        .name = "ep9in-int",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 9,
+                 .bmAttributes = USB_ENDPOINT_XFER_INT,
+
+                 .ep_type = ep_interrupt,
+                 .fifo_num = 9,
+                 },
+       .ep[10] = {
+                 .ep = {
+                        .name = "ep10out-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_OUT | 10,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_out,
+                 .fifo_num = 10,
+                 },
+       .ep[11] = {
+                 .ep = {
+                        .name = "ep11in-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 11, 
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_in,
+                 .fifo_num = 11,
+                 },
+       .ep[12] = {
+                 .ep = {
+                        .name = "ep12in-int",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 12,
+                 .bmAttributes = USB_ENDPOINT_XFER_INT,
+
+                 .ep_type = ep_interrupt,
+                 .fifo_num = 12,
+                 },
+       .ep[13] = {
+                 .ep = {
+                        .name = "ep13out-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_OUT | 13,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_out,
+                 .fifo_num = 13,
+                 },
+       .ep[14] = {
+                 .ep = {
+                        .name = "ep14in-bulk",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 14,
+                 .bmAttributes = USB_ENDPOINT_XFER_BULK,
+
+                 .ep_type = ep_bulk_in,
+                 .fifo_num = 14,
+                 },
+       .ep[15] = {
+                 .ep = {
+                        .name = "ep15in-int",
+                        .ops = &s3c_ep_ops,
+                        .maxpacket = EP_FIFO_SIZE,
+                        },
+                 .dev = &memory,
+
+                 .bEndpointAddress = USB_DIR_IN | 15,
+                 .bmAttributes = USB_ENDPOINT_XFER_INT,
+
+                 .ep_type = ep_interrupt,
+                 .fifo_num = 15,
+                 },
+};
+
+/*
+ *     probe - binds to the platform device
+ */
+static struct clk      *otg_clock = NULL;
+
+static int s3c_udc_probe(struct platform_device *pdev)
+{
+       struct resource *res;
+       struct s3c_udc *dev = &memory;
+       int retval, i;
+
+       DEBUG("%s: %p\n", __FUNCTION__, pdev);
+
+       spin_lock_init(&dev->lock);
+       dev->dev = pdev;
+
+       device_initialize(&dev->gadget.dev);
+       dev->gadget.dev.parent = &pdev->dev;
+
+       dev->gadget.is_dualspeed = 1;   /* Hack only*/
+       dev->gadget.is_otg = 0;
+       dev->gadget.is_a_peripheral = 0;
+       dev->gadget.b_hnp_enable = 0;
+       dev->gadget.a_hnp_support = 0;
+       dev->gadget.a_alt_hnp_support = 0;
+
+       the_controller = dev;
+       platform_set_drvdata(pdev, dev);
+
+       otg_clock = clk_get(&pdev->dev, "otg");
+       if (otg_clock == NULL) {
+               printk(KERN_INFO "failed to find otg clock source\n");
+               return -ENOENT;
+       }
+       clk_enable(otg_clock);
+
+       /* basic endpoint records init */
+       for (i = 0; i < S3C_MAX_ENDPOINTS+1; i++)
+               dev->dma_buf[i] = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL);
+       usb_ctrl = dev->dma_buf[0];
+       
+       printk(KERN_INFO "allocating resources\n");
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               printk(KERN_INFO "cannot find register resource 0\n");
+               return -EINVAL;
+       }
+
+       res_otg = request_mem_region(res->start, resource_size(res),
+                                       dev_name(&pdev->dev));
+       if (!res_otg) {
+               printk(KERN_INFO "cannot reserve registers\n");
+               return -ENOENT;
+       }
+
+       regs_otg = ioremap(res->start, resource_size(res));
+       if (!regs_otg) {
+               printk(KERN_INFO "cannot map registers\n");
+               retval = -ENXIO;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+       if (!res) {
+               printk(KERN_INFO "cannot find register resource 1\n");
+               return -EINVAL;
+       }
+
+       res_phy = request_mem_region(res->start, resource_size(res),
+                                       dev_name(&pdev->dev));
+       if (!res_phy) {
+               printk(KERN_INFO "cannot reserve registers\n");
+               return -ENOENT;
+       }
+
+       regs_phy = ioremap(res->start, resource_size(res));
+       if (!regs_phy) {
+               printk(KERN_INFO "cannot map registers\n");
+               retval = -ENXIO;
+       }
+
+       udc_reinit(dev);
+
+       local_irq_disable();
+
+       /* irq setup after old hardware state is cleaned up */
+       retval =
+           request_irq(IRQ_OTG, s3c_udc_irq, 0, driver_name, dev);
+
+       if (retval != 0) {
+               DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
+                     IRQ_OTG, retval);
+               return -EBUSY;
+       }
+
+       disable_irq(IRQ_OTG);
+       local_irq_enable();
+       create_proc_files();
+
+       return retval;
+}
+
+static int s3c_udc_remove(struct platform_device *pdev)
+{
+       struct s3c_udc *dev = platform_get_drvdata(pdev);
+
+       DEBUG("%s: %p\n", __FUNCTION__, pdev);
+
+       regulator_disable(dev->regulator_a);
+       regulator_disable(dev->regulator_d);
+       regulator_put(dev->regulator_a);
+       regulator_put(dev->regulator_d);
+
+       if (otg_clock != NULL) {
+               clk_disable(otg_clock);
+               clk_put(otg_clock);
+               otg_clock = NULL;
+       }
+
+       remove_proc_files();
+       usb_gadget_unregister_driver(dev->driver);
+
+       free_irq(IRQ_OTG, dev);
+
+       platform_set_drvdata(pdev, 0);
+
+       iounmap(regs_otg);
+       iounmap(regs_phy);
+
+       release_mem_region(res_phy->start, resource_size(res_phy));
+       release_mem_region(res_otg->start, resource_size(res_otg));
+
+       the_controller = 0;
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c_udc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        struct s3c_udc *dev = platform_get_drvdata(pdev);
+        int i;
+
+        if (dev->driver) {
+                if (dev->driver->suspend)
+                        dev->driver->suspend(&dev->gadget);
+
+                /* Terminate any outstanding requests  */
+                for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
+                        struct s3c_ep *ep = &dev->ep[i];
+                        if ( ep->dev != NULL )
+                                spin_lock(&ep->dev->lock);
+                        ep->stopped = 1;
+                        nuke(ep, -ESHUTDOWN);
+                        if ( ep->dev != NULL )
+                                spin_unlock(&ep->dev->lock);
+                }
+
+                disable_irq(IRQ_OTG);
+                udc_disable(dev);
+                clk_disable(otg_clock);
+
+               /* Workaround: can't find a regulator at probe time */
+               if (!dev->regulator_a) {
+                       dev->regulator_a = regulator_get(&pdev->dev, "vusb_a");
+                       if (IS_ERR(dev->regulator_a))
+                               dev->regulator_a = NULL;
+                       else
+                               regulator_enable(dev->regulator_a);
+               }
+
+               if (!dev->regulator_d) {
+                       dev->regulator_d = regulator_get(&pdev->dev, "vusb_d");
+                       if (IS_ERR(dev->regulator_d))
+                               dev->regulator_d = NULL;
+                       else
+                               regulator_enable(dev->regulator_d);
+               }
+
+               if (dev->regulator_a && regulator_is_enabled(dev->regulator_a)) {
+                       int ret = regulator_disable(dev->regulator_a);
+                       if (ret)
+                               return ret;
+               }
+
+               if (dev->regulator_d && regulator_is_enabled(dev->regulator_d)) {
+                       int ret = regulator_disable(dev->regulator_d);
+                       if (ret)
+                               return ret;
+               }
+        }
+
+        return 0;
+}
+
+static int s3c_udc_resume(struct platform_device *pdev)
+{
+        struct s3c_udc *dev = platform_get_drvdata(pdev);
+
+        if (dev->driver) {
+               if (dev->regulator_d) {
+                       int ret = regulator_enable(dev->regulator_d);
+                       if (ret)
+                               return ret;
+               }
+
+               if (dev->regulator_a) {
+                       int ret = regulator_enable(dev->regulator_a);
+                       if (ret)
+                               return ret;
+               }
+
+                clk_enable(otg_clock);
+                udc_reinit(dev);
+                enable_irq(IRQ_OTG);
+                udc_enable(dev);
+
+                if (dev->driver->resume)
+                        dev->driver->resume(&dev->gadget);
+        }
+
+        return 0;
+}
+#else
+#define s3c_udc_suspend NULL
+#define s3c_udc_resume  NULL
+#endif /* CONFIG_PM */
+
+/*-------------------------------------------------------------------------*/
+static struct platform_driver s3c_udc_driver = {
+       .probe          = s3c_udc_probe,
+       .remove         = s3c_udc_remove,
+       .suspend        = s3c_udc_suspend,
+       .resume         = s3c_udc_resume,
+       .driver         = {
+               .owner  = THIS_MODULE,
+               .name   = "s3c-otg",
+       },
+};
+
+static int __init udc_init(void)
+{
+       int ret;
+
+       ret = platform_driver_register(&s3c_udc_driver);
+       if(!ret)
+          printk("%s : %s\n"
+                 "%s : version %s %s \n",
+                 driver_name, DRIVER_DESC,
+                 driver_name, DRIVER_VERSION, OTG_DMA_MODE? "(DMA Mode)" : "(Slave Mode)");
+
+       return ret;
+}
+
+static void __exit udc_exit(void)
+{
+       platform_driver_unregister(&s3c_udc_driver);
+       printk("Unloaded %s version %s\n", driver_name, DRIVER_VERSION);
+}
+
+module_init(udc_init);
+module_exit(udc_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Samsung");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
new file mode 100644 (file)
index 0000000..eaca2bd
--- /dev/null
@@ -0,0 +1,1349 @@
+/*
+ * drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
+ * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
+ *
+ * Copyright (C) 2009 for Samsung Electronics
+ *
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#define GINTMSK_INIT   (INT_OUT_EP|INT_IN_EP|INT_RESUME|INT_ENUMDONE|INT_RESET|INT_SUSPEND)
+#define DOEPMSK_INIT   (CTRL_OUT_EP_SETUP_PHASE_DONE|AHB_ERROR|TRANSFER_DONE)
+#define DIEPMSK_INIT   (NON_ISO_IN_EP_TIMEOUT|AHB_ERROR|TRANSFER_DONE)
+#define GAHBCFG_INIT   (PTXFE_HALF|NPTXFE_HALF|MODE_DMA|BURST_INCR4|GBL_INT_UNMASK)
+
+static u8 clear_feature_num;
+static int clear_feature_flag = 0;
+
+/* Bulk-Only Mass Storage Reset (class-specific request) */
+#define GET_MAX_LUN_REQUEST    0xFE
+#define BOT_RESET_REQUEST      0xFF
+
+/* TEST MODE in set_feature request */
+#define TEST_SELECTOR_MASK     0xFF
+#define TEST_PKT_SIZE          53
+
+static u8 test_pkt[TEST_PKT_SIZE] = {
+       0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,                           //JKJKJKJK x 9
+       0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,                                //JJKKJJKK x 8
+       0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,                                //JJJJKKKK x 8
+       0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,            //JJJJJJJKKKKKKK x8 - '1'
+       0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,                                     //'1' + JJJJJJJK x 8
+       0xFC,0x7E,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0x7E                            //{JKKKKKKK x 10},JK
+};
+
+void s3c_udc_ep_set_stall(struct s3c_ep *ep);
+
+static inline void s3c_udc_ep0_zlp(void)
+{
+       u32 ep_ctrl;
+
+       dma_cache_maint(usb_ctrl, sizeof(*usb_ctrl), DMA_FROM_DEVICE);
+
+       writel(virt_to_phys(usb_ctrl), S3C_UDC_OTG_DIEPDMA(EP0_CON));
+       writel((1<<19| 0<<0), S3C_UDC_OTG_DIEPTSIZ(EP0_CON));
+
+       ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+       writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK, S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+       DEBUG_EP0("%s:EP0 ZLP DIEPCTL0 = 0x%x\n",
+               __func__, readl(S3C_UDC_OTG_DIEPCTL(EP0_CON)));
+}
+
+static inline void s3c_udc_pre_setup(void)
+{
+       u32 ep_ctrl;
+
+       DEBUG_IN_EP("%s : Prepare Setup packets.\n", __func__);
+
+       dma_cache_maint(usb_ctrl, sizeof(*usb_ctrl), DMA_FROM_DEVICE);
+
+       writel((1 << 19)|sizeof(struct usb_ctrlrequest), S3C_UDC_OTG_DOEPTSIZ(EP0_CON));
+       writel(virt_to_phys(usb_ctrl), S3C_UDC_OTG_DOEPDMA(EP0_CON));
+
+       ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(EP0_CON));
+       writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK, S3C_UDC_OTG_DOEPCTL(EP0_CON));
+}
+
+static int setdma_rx(struct s3c_ep *ep, struct s3c_request *req)
+{
+       u32 *buf, ctrl;
+       u32 length, pktcnt;
+       u32 ep_num = ep_index(ep);
+       u32 *p = the_controller->dma_buf[ep_index(ep)+1];
+
+       buf = req->req.buf + req->req.actual;
+
+       length = req->req.length - req->req.actual;
+
+       ep->len = length;
+       ep->dma_buf = buf;
+
+       dma_cache_maint(p, length, DMA_FROM_DEVICE);
+
+       if (length == 0)
+               pktcnt = 1;
+       else
+               pktcnt = (length - 1)/(ep->ep.maxpacket) + 1;
+
+       ctrl =  readl(S3C_UDC_OTG_DOEPCTL(ep_num));
+
+       writel(virt_to_phys(p), S3C_UDC_OTG_DOEPDMA(ep_num));
+       writel((pktcnt<<19)|(length<<0), S3C_UDC_OTG_DOEPTSIZ(ep_num));
+       writel(DEPCTL_EPENA|DEPCTL_CNAK|ctrl, S3C_UDC_OTG_DOEPCTL(ep_num));
+
+       DEBUG_OUT_EP("%s: EP%d RX DMA start : DOEPDMA = 0x%x, DOEPTSIZ = 0x%x, DOEPCTL = 0x%x\n"
+                       "\tbuf = 0x%p, pktcnt = %d, xfersize = %d\n",
+                       __func__, ep_num,
+                       readl(S3C_UDC_OTG_DOEPDMA(ep_num)),
+                       readl(S3C_UDC_OTG_DOEPTSIZ(ep_num)),
+                       readl(S3C_UDC_OTG_DOEPCTL(ep_num)),
+                       buf, pktcnt, length);
+       return 0;
+
+}
+
+static int setdma_tx(struct s3c_ep *ep, struct s3c_request *req)
+{
+       u32 *buf, ctrl = 0;
+       u32 length, pktcnt;
+       u32 ep_num = ep_index(ep);
+       u32 *p = the_controller->dma_buf[ep_index(ep)+1];
+
+       buf = req->req.buf + req->req.actual;
+       length = req->req.length - req->req.actual;
+
+       if (ep_num == EP0_CON) {
+               length = min(length, (u32)ep_maxpacket(ep));
+       }
+
+       ep->len = length;
+       ep->dma_buf = buf;
+       memcpy(p, ep->dma_buf, length);
+
+       dma_cache_maint(p, length, DMA_TO_DEVICE);
+
+       if (length == 0)
+               pktcnt = 1;
+       else
+               pktcnt = (length - 1)/(ep->ep.maxpacket) + 1;
+
+       /* Flush the endpoint's Tx FIFO */
+       writel(ep->fifo_num<<6, S3C_UDC_OTG_GRSTCTL);
+       writel((ep->fifo_num<<6)|0x20, S3C_UDC_OTG_GRSTCTL);
+       while(readl(S3C_UDC_OTG_GRSTCTL) & 0x20);
+
+       writel(virt_to_phys(p), S3C_UDC_OTG_DIEPDMA(ep_num));
+       writel((pktcnt<<19)|(length<<0), S3C_UDC_OTG_DIEPTSIZ(ep_num));
+
+       ctrl = readl(S3C_UDC_OTG_DIEPCTL(ep_num));
+
+       /* Write the FIFO number to be used for this endpoint */
+       ctrl &= ~(0xF << 22);
+       ctrl |= (ep->fifo_num << 22);
+
+       /* Clear reserved (Next EP) bits */
+       ctrl = (ctrl&~(EP_MASK<<DEPCTL_NEXT_EP_BIT));
+
+       writel(DEPCTL_EPENA|DEPCTL_CNAK|ctrl, S3C_UDC_OTG_DIEPCTL(ep_num));
+
+       DEBUG_IN_EP("%s:EP%d TX DMA start : DIEPDMA0 = 0x%x, DIEPTSIZ0 = 0x%x, DIEPCTL0 = 0x%x\n"
+                       "\tbuf = 0x%p, pktcnt = %d, xfersize = %d\n",
+                       __func__, ep_num,
+                       readl(S3C_UDC_OTG_DIEPDMA(ep_num)),
+                       readl(S3C_UDC_OTG_DIEPTSIZ(ep_num)),
+                       readl(S3C_UDC_OTG_DIEPCTL(ep_num)),
+                       buf, pktcnt, length);
+
+       return length;
+}
+
+static void complete_rx(struct s3c_udc *dev, u8 ep_num)
+{
+       struct s3c_ep *ep = &dev->ep[ep_num];
+       struct s3c_request *req = NULL;
+       u32 ep_tsr = 0, xfer_size = 0, xfer_length, is_short = 0;
+       u32 *p = the_controller->dma_buf[ep_index(ep)+1];
+
+       if (list_empty(&ep->queue)) {
+               DEBUG_OUT_EP("%s: RX DMA done : NULL REQ on OUT EP-%d\n",
+                                       __func__, ep_num);
+               return;
+
+       }
+
+       req = list_entry(ep->queue.next, struct s3c_request, queue);
+
+       ep_tsr = readl(S3C_UDC_OTG_DOEPTSIZ(ep_num));
+
+       if(ep_num == EP0_CON) {
+               xfer_size = (ep_tsr & 0x7f);
+       } else {
+               xfer_size = (ep_tsr & 0x7fff);
+       }
+
+       memcpy(ep->dma_buf, p, ep->len);
+
+       xfer_length = req->req.length - xfer_size;
+       req->req.actual += min(xfer_length, req->req.length - req->req.actual);
+       is_short = (xfer_length < ep->ep.maxpacket);
+
+       DEBUG_OUT_EP("%s: RX DMA done : ep = %d, rx bytes = %d/%d, "
+                    "is_short = %d, DOEPTSIZ = 0x%x, remained bytes = %d\n",
+                       __func__, ep_num, req->req.actual, req->req.length,
+                       is_short, ep_tsr, xfer_size);
+
+       if (is_short || req->req.actual == xfer_length) {
+               if(ep_num == EP0_CON && dev->ep0state == DATA_STATE_RECV) {
+                       DEBUG_OUT_EP("  => Send ZLP\n");
+                       s3c_udc_ep0_zlp();
+                       dev->ep0state = WAIT_FOR_COMPLETE; /* packet will be completed in complete_tx() */
+               } else {
+                       done(ep, req, 0);
+
+                       if(!list_empty(&ep->queue)) {
+                               req = list_entry(ep->queue.next, struct s3c_request, queue);
+                               DEBUG_OUT_EP("%s: Next Rx request start...\n", __func__);
+                               setdma_rx(ep, req);
+                       }
+               }
+       }
+}
+
+static void complete_tx(struct s3c_udc *dev, u8 ep_num)
+{
+       struct s3c_ep *ep = &dev->ep[ep_num];
+       struct s3c_request *req;
+       u32 ep_tsr = 0, xfer_size = 0, xfer_length, is_short = 0;
+       u32 last;
+
+       if (list_empty(&ep->queue)) {
+               DEBUG_IN_EP("%s: TX DMA done : NULL REQ on IN EP-%d\n",
+                                       __func__, ep_num);
+               return;
+
+       }
+
+       req = list_entry(ep->queue.next, struct s3c_request, queue);
+
+       ep_tsr = readl(S3C_UDC_OTG_DIEPTSIZ(ep_num));
+
+       xfer_size = ep->len;
+       is_short = (xfer_size < ep->ep.maxpacket);
+       req->req.actual += xfer_size;
+
+       DEBUG_IN_EP("%s: TX DMA done : ep = %d, tx bytes = %d/%d, "
+                    "is_short = %d, DIEPTSIZ = 0x%x, remained bytes = %d\n",
+                       __func__, ep_num, req->req.actual, req->req.length,
+                       is_short, ep_tsr, xfer_size);
+
+       if (ep_num == 0) {
+               if (dev->ep0state == DATA_STATE_XMIT) {
+                       DEBUG_IN_EP("%s: ep_num = %d, ep0stat == DATA_STATE_XMIT\n",
+                                       __func__, ep_num);
+                       last = write_fifo_ep0(ep, req);
+                       if (last) 
+                               dev->ep0state = WAIT_FOR_COMPLETE;
+               } else if (dev->ep0state == WAIT_FOR_COMPLETE) {
+                       DEBUG_IN_EP("%s: ep_num = %d, completing request\n", __func__, ep_num);
+                       done(ep, req, 0);
+                       dev->ep0state = WAIT_FOR_SETUP;
+               } else {
+                       DEBUG_IN_EP("%s: ep_num = %d, invalid ep state\n", __func__, ep_num);
+               }
+               return;
+       }
+
+       if (req->req.actual == req->req.length)
+               done(ep, req, 0);
+       
+       if(!list_empty(&ep->queue)) {
+               req = list_entry(ep->queue.next, struct s3c_request, queue);
+               DEBUG_IN_EP("%s: Next Tx request start...\n", __func__);
+               setdma_tx(ep, req);
+       }
+}
+
+static inline void s3c_udc_check_tx_queue(struct s3c_udc *dev, u8 ep_num)
+{
+       struct s3c_ep *ep = &dev->ep[ep_num];
+       struct s3c_request *req;
+
+       DEBUG_IN_EP("%s: Check queue, ep_num = %d\n", __func__, ep_num);
+
+       if (!list_empty(&ep->queue)) {
+               req = list_entry(ep->queue.next, struct s3c_request, queue);
+               DEBUG_IN_EP("%s: Next Tx request(0x%p) start...\n", __func__, req);
+
+               if (ep_is_in(ep))
+                       setdma_tx(ep, req);
+               else
+                       setdma_rx(ep, req);
+       } else {
+               DEBUG_IN_EP("%s: NULL REQ on IN EP-%d\n", __func__, ep_num);
+
+               return;
+       }
+
+}
+
+static void process_ep_in_intr(struct s3c_udc *dev)
+{
+       u32 ep_intr, ep_intr_status;
+       u8 ep_num = 0;
+
+       ep_intr = readl(S3C_UDC_OTG_DAINT);
+       DEBUG_IN_EP("*** %s: EP In interrupt : DAINT = 0x%x\n",
+                               __func__, ep_intr);
+
+       ep_intr &= DAINT_MASK;
+
+       while(ep_intr) {
+               if (ep_intr & 0x1) {
+                       ep_intr_status = readl(S3C_UDC_OTG_DIEPINT(ep_num));
+                       DEBUG_IN_EP("\tEP%d-IN : DIEPINT = 0x%x\n",
+                                               ep_num, ep_intr_status);
+
+                       /* Interrupt Clear */
+                       writel(ep_intr_status, S3C_UDC_OTG_DIEPINT(ep_num));
+
+                       if (ep_intr_status & TRANSFER_DONE) {
+                               complete_tx(dev, ep_num);
+
+                               if (ep_num == 0) {
+                                       if(dev->ep0state == WAIT_FOR_SETUP) {
+                                               s3c_udc_pre_setup();
+                                       }
+
+                                       /* continue transfer after set_clear_halt for DMA mode */
+                                       if (clear_feature_flag == 1) {
+                                               s3c_udc_check_tx_queue(dev, clear_feature_num);
+                                               clear_feature_flag = 0;
+                                       }
+                               }
+                       }
+               }
+               ep_num++;
+               ep_intr >>= 1;
+       }
+
+}
+
+static void process_ep_out_intr(struct s3c_udc * dev)
+{
+       u32 ep_intr, ep_intr_status;
+       u8 ep_num = 0;
+
+       ep_intr = readl(S3C_UDC_OTG_DAINT);
+       DEBUG_OUT_EP("*** %s: EP OUT interrupt : DAINT = 0x%x\n",
+                               __func__, ep_intr);
+
+       ep_intr = (ep_intr >> DAINT_OUT_BIT) & DAINT_MASK;
+
+       while(ep_intr) {
+               if (ep_intr & 0x1) {
+                       ep_intr_status = readl(S3C_UDC_OTG_DOEPINT(ep_num));
+                       DEBUG_OUT_EP("\tEP%d-OUT : DOEPINT = 0x%x\n",
+                                               ep_num, ep_intr_status);
+
+                       /* Interrupt Clear */
+                       writel(ep_intr_status, S3C_UDC_OTG_DOEPINT(ep_num));
+
+                       if (ep_num == 0 ) {
+                               if (ep_intr_status & TRANSFER_DONE) {
+                                       complete_rx(dev, ep_num);
+                                       s3c_udc_pre_setup();
+                               }
+
+                               if (ep_intr_status & CTRL_OUT_EP_SETUP_PHASE_DONE) {
+                                       DEBUG_OUT_EP("\tSETUP packet(transaction) arrived\n");
+                                       s3c_handle_ep0(dev);
+                               }
+                       } else {
+                               if (ep_intr_status & TRANSFER_DONE) {
+                                       complete_rx(dev, ep_num);
+                               }
+                       }
+               }
+               ep_num++;
+               ep_intr >>= 1;
+       }
+}
+
+/*
+ *     usb client interrupt handler.
+ */
+static irqreturn_t s3c_udc_irq(int irq, void *_dev)
+{
+       struct s3c_udc *dev = _dev;
+       u32 intr_status;
+       u32 usb_status, gintmsk;
+       unsigned long flags;
+
+       spin_lock_irqsave(&dev->lock, flags);
+
+       intr_status = readl(S3C_UDC_OTG_GINTSTS);
+       gintmsk = readl(S3C_UDC_OTG_GINTMSK);
+
+       DEBUG_ISR("\n*** %s : GINTSTS=0x%x(on state %s), GINTMSK : 0x%x, DAINT : 0x%x, DAINTMSK : 0x%x\n",
+                       __func__, intr_status, state_names[dev->ep0state], gintmsk,
+                       readl(S3C_UDC_OTG_DAINT), readl(S3C_UDC_OTG_DAINTMSK));
+
+       if (!intr_status) {
+               spin_unlock_irqrestore(&dev->lock, flags);
+               return IRQ_HANDLED;
+       }
+
+       if (intr_status & INT_ENUMDONE) {
+               DEBUG_ISR("\tSpeed Detection interrupt\n");
+
+               writel(INT_ENUMDONE, S3C_UDC_OTG_GINTSTS);
+               usb_status = (readl(S3C_UDC_OTG_DSTS) & 0x6);
+
+               if (usb_status & (USB_FULL_30_60MHZ | USB_FULL_48MHZ)) {
+                       DEBUG_ISR("\t\tFull Speed Detection\n");
+                       set_max_pktsize(dev, USB_SPEED_FULL);
+
+               } else {
+                       DEBUG_ISR("\t\tHigh Speed Detection : 0x%x\n", usb_status);
+                       set_max_pktsize(dev, USB_SPEED_HIGH);
+               }
+       }
+
+       if (intr_status & INT_EARLY_SUSPEND) {
+               DEBUG_ISR("\tEarly suspend interrupt\n");
+               writel(INT_EARLY_SUSPEND, S3C_UDC_OTG_GINTSTS);
+       }
+
+       if (intr_status & INT_SUSPEND) {
+               usb_status = readl(S3C_UDC_OTG_DSTS);
+               DEBUG_ISR("\tSuspend interrupt :(DSTS):0x%x\n", usb_status);
+               writel(INT_SUSPEND, S3C_UDC_OTG_GINTSTS);
+
+               if (dev->gadget.speed != USB_SPEED_UNKNOWN
+                   && dev->driver
+                   && dev->driver->suspend) {
+
+                       dev->driver->suspend(&dev->gadget);
+               }
+       }
+
+       if (intr_status & INT_RESUME) {
+               DEBUG_ISR("\tResume interrupt\n");
+               writel(INT_RESUME, S3C_UDC_OTG_GINTSTS);
+
+               if (dev->gadget.speed != USB_SPEED_UNKNOWN
+                   && dev->driver
+                   && dev->driver->resume) {
+
+                       dev->driver->resume(&dev->gadget);
+               }
+       }
+
+       if (intr_status & INT_RESET) {
+               usb_status = readl(S3C_UDC_OTG_GOTGCTL);
+               DEBUG_ISR("\tReset interrupt - (GOTGCTL):0x%x\n", usb_status);
+               writel(INT_RESET, S3C_UDC_OTG_GINTSTS);
+
+               if((usb_status & 0xc0000) == (0x3 << 18)) {
+                       if(reset_available) {
+                               DEBUG_ISR("\t\tOTG core got reset (%d)!! \n", reset_available);
+                               reconfig_usbd();
+                               dev->ep0state = WAIT_FOR_SETUP;
+                               reset_available = 0;
+                               s3c_udc_pre_setup();
+                       } else
+                               reset_available = 1;
+
+               } else {
+                       reset_available = 1;
+                       DEBUG_ISR("\t\tRESET handling skipped\n");
+               }
+       }
+
+       if (intr_status & INT_IN_EP) {
+               process_ep_in_intr(dev);
+       }
+
+       if(intr_status & INT_OUT_EP) {
+               process_ep_out_intr(dev);
+       }
+
+       spin_unlock_irqrestore(&dev->lock, flags);
+
+       return IRQ_HANDLED;
+}
+
+/** Queue one request
+ *  Kickstart transfer if needed
+ */
+static int s3c_queue(struct usb_ep *_ep, struct usb_request *_req,
+                        gfp_t gfp_flags)
+{
+       struct s3c_request *req;
+       struct s3c_ep *ep;
+       struct s3c_udc *dev;
+       unsigned long flags;
+       u32 ep_num, gintsts;
+
+       req = container_of(_req, struct s3c_request, req);
+       if (unlikely(!_req || !_req->complete || !_req->buf || !list_empty(&req->queue))) {
+
+               DEBUG("%s: bad params\n", __func__);
+               return -EINVAL;
+       }
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+
+       if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+
+               DEBUG("%s: bad ep\n", __func__);
+               return -EINVAL;
+       }
+
+       ep_num = ep_index(ep);
+       dev = ep->dev;
+       if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
+
+               DEBUG("%s: bogus device state %p\n", __func__, dev->driver);
+               return -ESHUTDOWN;
+       }
+
+       spin_lock_irqsave(&dev->lock, flags);
+
+       _req->status = -EINPROGRESS;
+       _req->actual = 0;
+
+       /* kickstart this i/o queue? */
+       DEBUG("\n*** %s: %s-%s req = %p, len = %d, buf = %p"
+               "Q empty = %d, stopped = %d\n",
+               __func__,_ep->name, ep_is_in(ep)? "in" : "out",
+               _req, _req->length,_req->buf,
+               list_empty(&ep->queue), ep->stopped);
+
+       if (list_empty(&ep->queue) && !ep->stopped) {
+
+               if (ep_num == 0) {
+                       /* EP0 */
+                       list_add_tail(&req->queue, &ep->queue);
+                       s3c_ep0_kick(dev, ep);
+                       req = 0;
+
+               } else if (ep_is_in(ep)) {
+                       gintsts = readl(S3C_UDC_OTG_GINTSTS);
+                       DEBUG_IN_EP("%s: ep_is_in, S3C_UDC_OTG_GINTSTS=0x%x\n",
+                                               __func__, gintsts);
+
+                       setdma_tx(ep, req);
+               } else {
+                       gintsts = readl(S3C_UDC_OTG_GINTSTS);
+                       DEBUG_OUT_EP("%s: ep_is_out, S3C_UDC_OTG_GINTSTS=0x%x\n",
+                               __func__, gintsts);
+
+                       setdma_rx(ep, req);
+               }
+       }
+
+       /* pio or dma irq handler advances the queue. */
+       if (likely(req != 0)) {
+               list_add_tail(&req->queue, &ep->queue);
+       }
+
+       spin_unlock_irqrestore(&dev->lock, flags);
+
+       return 0;
+}
+
+/****************************************************************/
+/* End Point 0 related functions                                */
+/****************************************************************/
+
+/* return:  0 = still running, 1 = completed, negative = errno */
+static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req)
+{
+       u32 max;
+       unsigned count;
+       int is_last;
+
+       max = ep_maxpacket(ep);
+
+       DEBUG_EP0("%s: max = %d\n", __func__, max);
+
+       count = setdma_tx(ep, req);
+
+       /* last packet is usually short (or a zlp) */
+       if (likely(count != max))
+               is_last = 1;
+       else {
+               if (likely(req->req.length != req->req.actual) || req->req.zero)
+                       is_last = 0;
+               else
+                       is_last = 1;
+       }
+
+       DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __func__,
+                 ep->ep.name, count,
+                 is_last ? "/L" : "", req->req.length - req->req.actual, req);
+
+       /* requests complete when all IN data is in the FIFO */
+       if (is_last) {
+               ep->dev->ep0state = WAIT_FOR_SETUP;
+               return 1;
+       }
+
+       return 0;
+}
+
+static __inline__ int s3c_fifo_read(struct s3c_ep *ep, u32 *cp, int max)
+{
+       u32 bytes;
+
+       bytes = sizeof(struct usb_ctrlrequest);
+//     dma_cache_maint(usb_ctrl, bytes, DMA_FROM_DEVICE);
+       DEBUG_EP0("%s: bytes=%d, ep_index=%d \n", __func__, bytes, ep_index(ep));
+
+       return bytes;
+}
+
+/**
+ * udc_set_address - set the USB address for this device
+ * @address:
+ *
+ * Called from control endpoint function
+ * after it decodes a set address setup packet.
+ */
+static void udc_set_address(struct s3c_udc *dev, unsigned char address)
+{
+       u32 ctrl = readl(S3C_UDC_OTG_DCFG);
+       writel(address << 4 | ctrl, S3C_UDC_OTG_DCFG);
+
+       s3c_udc_ep0_zlp();
+
+       DEBUG_EP0("%s: USB OTG 2.0 Device address=%d, DCFG=0x%x\n",
+               __func__, address, readl(S3C_UDC_OTG_DCFG));
+
+       dev->usb_address = address;
+}
+
+static inline void s3c_udc_ep0_set_stall(struct s3c_ep *ep) 
+{
+       struct s3c_udc *dev;
+       u32             ep_ctrl = 0;
+
+       dev = ep->dev;
+       ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+       /* set the disable and stall bits */
+       if (ep_ctrl & DEPCTL_EPENA) {
+               ep_ctrl |= DEPCTL_EPDIS;
+       }
+       ep_ctrl |= DEPCTL_STALL;
+
+       writel(ep_ctrl, S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+       DEBUG_EP0("%s: set ep%d stall, DIEPCTL0 = 0x%x\n",
+               __func__, ep_index(ep), readl(S3C_UDC_OTG_DIEPCTL(EP0_CON)));
+       /* 
+        * The application can only set this bit, and the core clears it,
+        * when a SETUP token is received for this endpoint
+        */
+       dev->ep0state = WAIT_FOR_SETUP;
+
+       s3c_udc_pre_setup();
+}
+
+static void s3c_ep0_read(struct s3c_udc *dev)
+{
+       struct s3c_request *req;
+       struct s3c_ep *ep = &dev->ep[0];
+       int ret;
+
+       if (!list_empty(&ep->queue)) {
+               req = list_entry(ep->queue.next, struct s3c_request, queue);
+
+       } else {
+               DEBUG("%s: ---> BUG\n", __func__);
+               BUG();
+               return;
+       }
+
+       DEBUG_EP0("%s: req = %p, req.length = 0x%x, req.actual = 0x%x\n",
+               __func__, req, req->req.length, req->req.actual);
+
+       if(req->req.length == 0) {
+               /* zlp for Set_configuration, Set_interface,
+                * or Bulk-Only mass storge reset */
+
+               dev->ep0state = WAIT_FOR_COMPLETE;
+               s3c_udc_ep0_zlp();
+
+               DEBUG_EP0("%s: req.length = 0, bRequest = %d\n", __func__, usb_ctrl->bRequest);
+               return;
+       }
+
+       ret = setdma_rx(ep, req);
+}
+
+/*
+ * DATA_STATE_XMIT
+ */
+static int s3c_ep0_write(struct s3c_udc *dev)
+{
+       struct s3c_request *req;
+       struct s3c_ep *ep = &dev->ep[0];
+       int ret, need_zlp = 0;
+
+       if (list_empty(&ep->queue)) {
+               req = 0;
+
+       } else {
+               req = list_entry(ep->queue.next, struct s3c_request, queue);
+       }
+
+       if (!req) {
+               DEBUG_EP0("%s: NULL REQ\n", __func__);
+               return 0;
+       }
+
+       DEBUG_EP0("%s: req = %p, req.length = 0x%x, req.actual = 0x%x\n",
+               __func__, req, req->req.length, req->req.actual);
+
+       if (req->req.length - req->req.actual == ep0_fifo_size) {
+               /* Next write will end with the packet size, */
+               /* so we need Zero-length-packet */
+               need_zlp = 1;
+       }
+
+       ret = write_fifo_ep0(ep, req);
+
+       if ((ret == 1) && !need_zlp) {
+               /* Last packet */
+               dev->ep0state = WAIT_FOR_COMPLETE;
+               DEBUG_EP0("%s: finished, waiting for status\n", __func__);
+
+       } else {
+               dev->ep0state = DATA_STATE_XMIT;
+               DEBUG_EP0("%s: not finished\n", __func__);
+       }
+
+       if (need_zlp) {
+               dev->ep0state = DATA_STATE_NEED_ZLP;
+               DEBUG_EP0("%s: Need ZLP!\n", __func__);
+       }
+
+       return 1;
+}
+
+u16    g_status;
+
+static int s3c_udc_get_status(struct s3c_udc *dev,
+               struct usb_ctrlrequest *crq)
+{
+       u8 ep_num = crq->wIndex & 0x7F;
+       u32 ep_ctrl;
+       u32 *p = the_controller->dma_buf[1];
+
+
+       DEBUG_SETUP("%s: *** USB_REQ_GET_STATUS  \n",__func__);
+
+       switch (crq->bRequestType & USB_RECIP_MASK) {
+       case USB_RECIP_INTERFACE:
+               g_status = 0;
+               DEBUG_SETUP("\tGET_STATUS: USB_RECIP_INTERFACE, g_stauts = %d\n", g_status);
+               break;
+
+       case USB_RECIP_DEVICE:
+               g_status = 0x1; /* Self powered */
+               DEBUG_SETUP("\tGET_STATUS: USB_RECIP_DEVICE, g_stauts = %d\n", g_status);
+               break;
+
+       case USB_RECIP_ENDPOINT:
+               if (crq->wLength > 2) {
+                       DEBUG_SETUP("\tGET_STATUS: Not support EP or wLength\n");
+                       return 1;
+               }
+
+               g_status = dev->ep[ep_num].stopped;
+               DEBUG_SETUP("\tGET_STATUS: USB_RECIP_ENDPOINT, g_stauts = %d\n", g_status);
+
+               break;
+
+       default:
+               return 1;
+       }
+
+       memcpy(p, &g_status, sizeof(g_status));
+       dma_cache_maint(p, 2, DMA_TO_DEVICE);
+
+       writel(virt_to_phys(p), S3C_UDC_OTG_DIEPDMA(EP0_CON));
+       writel((1<<19)|(2<<0), S3C_UDC_OTG_DIEPTSIZ(EP0_CON));
+
+       ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+       writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK, S3C_UDC_OTG_DIEPCTL(EP0_CON));
+       dev->ep0state = WAIT_FOR_SETUP;
+
+       return 0;
+}
+
+void s3c_udc_ep_set_stall(struct s3c_ep *ep)
+{
+       u8              ep_num;
+       u32             ep_ctrl = 0;
+
+       ep_num = ep_index(ep);
+       DEBUG("%s: ep_num = %d, ep_type = %d\n", __func__, ep_num, ep->ep_type);
+               
+       if (ep_is_in(ep)) {
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(ep_num));
+       
+               /* set the disable and stall bits */
+               if (ep_ctrl & DEPCTL_EPENA) {
+                       ep_ctrl |= DEPCTL_EPDIS;
+               }
+               ep_ctrl |= DEPCTL_STALL;
+
+               writel(ep_ctrl, S3C_UDC_OTG_DIEPCTL(ep_num));
+               DEBUG("%s: set stall, DIEPCTL%d = 0x%x\n",
+                       __func__, ep_num, readl(S3C_UDC_OTG_DIEPCTL(ep_num)));
+
+       } else {
+               ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(ep_num));
+
+               /* set the stall bit */
+               ep_ctrl |= DEPCTL_STALL;
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(ep_num));
+
+               writel(ep_ctrl, S3C_UDC_OTG_DOEPCTL(ep_num));
+               DEBUG("%s: set stall, DOEPCTL%d = 0x%x\n",
+                       __func__, ep_num, readl(S3C_UDC_OTG_DOEPCTL(ep_num)));
+       }
+               
+       return;
+}
+
+void s3c_udc_ep_clear_stall(struct s3c_ep *ep)
+{
+       u8              ep_num;
+       u32             ep_ctrl = 0;
+
+       ep_num = ep_index(ep);  
+       DEBUG("%s: ep_num = %d, ep_type = %d\n", __func__, ep_num, ep->ep_type);
+
+       if (ep_is_in(ep)) {
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(ep_num));
+
+               /* clear stall bit */
+               ep_ctrl &= ~DEPCTL_STALL;
+
+               /* 
+                * USB Spec 9.4.5: For endpoints using data toggle, regardless
+                * of whether an endpoint has the Halt feature set, a
+                * ClearFeature(ENDPOINT_HALT) request always results in the
+                * data toggle being reinitialized to DATA0.
+                */
+               if (ep->bmAttributes == USB_ENDPOINT_XFER_INT
+                   || ep->bmAttributes == USB_ENDPOINT_XFER_BULK) {
+                       ep_ctrl |= DEPCTL_SETD0PID; /* DATA0 */
+               }
+
+               writel(ep_ctrl, S3C_UDC_OTG_DIEPCTL(ep_num));
+               DEBUG("%s: cleared stall, DIEPCTL%d = 0x%x\n",
+                       __func__, ep_num, readl(S3C_UDC_OTG_DIEPCTL(ep_num)));
+
+       } else {
+               ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(ep_num));
+
+               /* clear stall bit */
+               ep_ctrl &= ~DEPCTL_STALL;
+
+               if (ep->bmAttributes == USB_ENDPOINT_XFER_INT
+                   || ep->bmAttributes == USB_ENDPOINT_XFER_BULK) {
+                       ep_ctrl |= DEPCTL_SETD0PID; /* DATA0 */
+               }
+
+               writel(ep_ctrl, S3C_UDC_OTG_DOEPCTL(ep_num));
+               DEBUG("%s: cleared stall, DOEPCTL%d = 0x%x\n",
+                       __func__, ep_num, readl(S3C_UDC_OTG_DOEPCTL(ep_num)));
+       }
+
+       return;
+}
+
+static int s3c_udc_set_halt(struct usb_ep *_ep, int value)
+{
+       struct s3c_ep   *ep;
+       struct s3c_udc  *dev;
+       unsigned long   flags;
+       u8              ep_num;
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       ep_num = ep_index(ep);
+
+       if (unlikely (!_ep || !ep->desc || ep_num == EP0_CON ||
+                       ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC)) {
+               DEBUG("%s: %s bad ep or descriptor\n", __func__, ep->ep.name);
+               return -EINVAL;
+       }
+
+       /* Attempt to halt IN ep will fail if any transfer requests
+        * are still queue */
+       if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
+               DEBUG("%s: %s queue not empty, req = %p\n",
+                       __func__, ep->ep.name,
+                       list_entry(ep->queue.next, struct s3c_request, queue));
+
+               return -EAGAIN;
+       }
+
+       dev = ep->dev;
+       DEBUG("%s: ep_num = %d, value = %d\n", __func__, ep_num, value);
+
+       spin_lock_irqsave(&dev->lock, flags);
+
+       if (value == 0) {
+               ep->stopped = 0;
+               s3c_udc_ep_clear_stall(ep);
+       } else {
+               if (ep_num == 0) {
+                       dev->ep0state = WAIT_FOR_SETUP;
+               }
+               
+               ep->stopped = 1;
+               s3c_udc_ep_set_stall(ep);
+       }
+
+       spin_unlock_irqrestore(&dev->lock, flags);
+
+       return 0;
+}
+
+void s3c_udc_ep_activate(struct s3c_ep *ep)
+{
+       u8 ep_num;
+       u32 ep_ctrl = 0, daintmsk = 0;
+       
+       ep_num = ep_index(ep);
+
+       /* Read DEPCTLn register */
+       if (ep_is_in(ep)) {
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(ep_num));
+               daintmsk = 1 << ep_num;
+       } else {
+               ep_ctrl = readl(S3C_UDC_OTG_DOEPCTL(ep_num));
+               daintmsk = (1 << ep_num) << DAINT_OUT_BIT;
+       }
+
+       DEBUG("%s: EPCTRL%d = 0x%x, ep_is_in = %d\n",
+               __func__, ep_num, ep_ctrl, ep_is_in(ep));
+               
+       /* If the EP is already active don't change the EP Control
+        * register. */
+       if (!(ep_ctrl & DEPCTL_USBACTEP)) {
+               ep_ctrl = (ep_ctrl & ~DEPCTL_TYPE_MASK)| (ep->bmAttributes << DEPCTL_TYPE_BIT);
+               ep_ctrl = (ep_ctrl & ~DEPCTL_MPS_MASK) | (ep->ep.maxpacket << DEPCTL_MPS_BIT);
+               ep_ctrl |= (DEPCTL_SETD0PID | DEPCTL_USBACTEP);
+
+               if (ep_is_in(ep)) {
+                       writel(ep_ctrl, S3C_UDC_OTG_DIEPCTL(ep_num));
+                       DEBUG("%s: USB Ative EP%d, DIEPCTRL%d = 0x%x\n",
+                               __func__, ep_num, ep_num, readl(S3C_UDC_OTG_DIEPCTL(ep_num)));
+               } else {
+                       writel(ep_ctrl, S3C_UDC_OTG_DOEPCTL(ep_num));
+                       DEBUG("%s: USB Ative EP%d, DOEPCTRL%d = 0x%x\n",
+                               __func__, ep_num, ep_num, readl(S3C_UDC_OTG_DOEPCTL(ep_num)));
+               }
+       }
+
+       /* Unmask EP Interrtupt */
+       writel(readl(S3C_UDC_OTG_DAINTMSK)|daintmsk, S3C_UDC_OTG_DAINTMSK);
+       DEBUG("%s: DAINTMSK = 0x%x\n", __func__, readl(S3C_UDC_OTG_DAINTMSK));
+
+}
+
+static int s3c_udc_clear_feature(struct usb_ep *_ep)
+{
+       struct s3c_ep   *ep;
+       u8              ep_num;
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       ep_num = ep_index(ep);
+
+       DEBUG_SETUP("%s: ep_num = %d, is_in = %d, clear_feature_flag = %d\n",
+               __func__, ep_num, ep_is_in(ep), clear_feature_flag);
+
+       if (usb_ctrl->wLength != 0) {
+               DEBUG_SETUP("\tCLEAR_FEATURE: wLength is not zero.....\n");
+               return 1;
+       }
+
+       switch (usb_ctrl->bRequestType & USB_RECIP_MASK) {
+       case USB_RECIP_DEVICE:
+               switch (usb_ctrl->wValue) {
+               case USB_DEVICE_REMOTE_WAKEUP:
+                       DEBUG_SETUP("\tCLEAR_FEATURE: USB_DEVICE_REMOTE_WAKEUP\n");
+                       break;
+
+               case USB_DEVICE_TEST_MODE:
+                       DEBUG_SETUP("\tCLEAR_FEATURE: USB_DEVICE_TEST_MODE\n");
+                       /** @todo Add CLEAR_FEATURE for TEST modes. */
+                       break;
+               }
+
+               s3c_udc_ep0_zlp();
+               break;
+
+       case USB_RECIP_ENDPOINT:
+               DEBUG_SETUP("\tCLEAR_FEATURE: USB_RECIP_ENDPOINT, wValue = %d\n",
+                               usb_ctrl->wValue);
+
+               if (usb_ctrl->wValue == USB_ENDPOINT_HALT) {
+                       if (ep_num == 0) {
+                               s3c_udc_ep0_set_stall(ep);
+                               return 0;
+                       } 
+
+                       s3c_udc_ep0_zlp();
+
+                       s3c_udc_ep_clear_stall(ep);
+                       s3c_udc_ep_activate(ep);
+                       ep->stopped = 0;
+
+                       clear_feature_num = ep_num;
+                       clear_feature_flag = 1;
+               }
+               break;
+       }
+
+       return 0;
+}
+
+/* Set into the test mode for Test Mode set_feature request */
+static inline void set_test_mode(void)
+{
+       u32 ep_ctrl, dctl;
+       u8 test_selector = (usb_ctrl->wIndex>>8) & TEST_SELECTOR_MASK;
+
+       if(test_selector>0 && test_selector<6)
+       {
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+               writel(1<<19| 0<<0, S3C_UDC_OTG_DIEPTSIZ(EP0_CON));
+               writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK|EP0_CON<<DEPCTL_NEXT_EP_BIT , S3C_UDC_OTG_DIEPCTL(EP0_CON));
+       }
+
+       switch(test_selector) {
+       case TEST_J_SEL:
+               /* some delay is necessary like printk() or udelay() */
+               printk("Test mode selector in set_feature request is TEST J\n");
+
+               dctl = readl(S3C_UDC_OTG_DCTL);
+               writel((dctl&~(TEST_CONTROL_MASK))|TEST_J_MODE, S3C_UDC_OTG_DCTL);
+               break;
+       case TEST_K_SEL:
+               /* some delay is necessary like printk() or udelay() */
+               printk("Test mode selector in set_feature request is TEST K\n");
+
+               dctl = readl(S3C_UDC_OTG_DCTL);
+               writel((dctl&~(TEST_CONTROL_MASK))|TEST_K_MODE, S3C_UDC_OTG_DCTL);
+               break;
+       case TEST_SE0_NAK_SEL:
+               /* some delay is necessary like printk() or udelay() */
+               printk("Test mode selector in set_feature request is TEST SE0 NAK\n");
+
+               dctl = readl(S3C_UDC_OTG_DCTL);
+               writel((dctl&~(TEST_CONTROL_MASK))|TEST_SE0_NAK_MODE, S3C_UDC_OTG_DCTL);
+               break;
+       case TEST_PACKET_SEL:
+               /* some delay is necessary like printk() or udelay() */
+               printk("Test mode selector in set_feature request is TEST PACKET\n");
+
+               dma_cache_maint(test_pkt, TEST_PKT_SIZE, DMA_TO_DEVICE);
+               writel(virt_to_phys(test_pkt), S3C_UDC_OTG_DIEPDMA(EP0_CON));
+
+               ep_ctrl = readl(S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+               writel(1<<19| TEST_PKT_SIZE<<0, S3C_UDC_OTG_DIEPTSIZ(EP0_CON));
+               writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK|EP0_CON<<DEPCTL_NEXT_EP_BIT, S3C_UDC_OTG_DIEPCTL(EP0_CON));
+
+               dctl = readl(S3C_UDC_OTG_DCTL);
+               writel((dctl&~(TEST_CONTROL_MASK))|TEST_PACKET_MODE, S3C_UDC_OTG_DCTL);
+               break;
+       case TEST_FORCE_ENABLE_SEL:
+               /* some delay is necessary like printk() or udelay() */
+               printk("Test mode selector in set_feature request is TEST FORCE ENABLE\n");
+
+               dctl = readl(S3C_UDC_OTG_DCTL);
+               writel((dctl&~(TEST_CONTROL_MASK))|TEST_FORCE_ENABLE_MODE, S3C_UDC_OTG_DCTL);
+               break;
+       }
+}
+
+static int s3c_udc_set_feature(struct usb_ep *_ep)
+{
+       struct s3c_ep   *ep;
+       u8              ep_num;
+
+       ep = container_of(_ep, struct s3c_ep, ep);
+       ep_num = ep_index(ep);
+
+       DEBUG_SETUP("%s: *** USB_REQ_SET_FEATURE , ep_num = %d\n",__func__, ep_num);
+
+       if (usb_ctrl->wLength != 0) {
+               DEBUG_SETUP("\tSET_FEATURE: wLength is not zero.....\n");
+               return 1;
+       }
+
+       switch (usb_ctrl->bRequestType & USB_RECIP_MASK) {
+       case USB_RECIP_DEVICE:
+               switch (usb_ctrl->wValue) {
+               case USB_DEVICE_REMOTE_WAKEUP:
+                       DEBUG_SETUP("\tSET_FEATURE: USB_DEVICE_REMOTE_WAKEUP\n");
+                       break;
+
+               case USB_DEVICE_TEST_MODE:
+                       DEBUG_SETUP("\tSET_FEATURE: USB_DEVICE_TEST_MODE\n");
+                       set_test_mode();
+                       break;
+
+               case USB_DEVICE_B_HNP_ENABLE:
+                       DEBUG_SETUP("\tSET_FEATURE: USB_DEVICE_B_HNP_ENABLE\n");
+                       break;
+
+               case USB_DEVICE_A_HNP_SUPPORT:
+                       /* RH port supports HNP */
+                       DEBUG_SETUP("\tSET_FEATURE: USB_DEVICE_A_HNP_SUPPORT\n");
+                       break;
+
+               case USB_DEVICE_A_ALT_HNP_SUPPORT:
+                       /* other RH port does */
+                       DEBUG_SETUP("\tSET_FEATURE: USB_DEVICE_A_ALT_HNP_SUPPORT\n");
+                       break;
+               }
+
+               s3c_udc_ep0_zlp();
+               return 0;
+
+       case USB_RECIP_INTERFACE:
+               DEBUG_SETUP("\tSET_FEATURE: USB_RECIP_INTERFACE\n");
+               break;
+
+       case USB_RECIP_ENDPOINT:
+               DEBUG_SETUP("\tSET_FEATURE: USB_RECIP_ENDPOINT\n");
+               if (usb_ctrl->wValue == USB_ENDPOINT_HALT) {
+                       if (ep_num == 0) {
+                               s3c_udc_ep0_set_stall(ep);
+                               return 0;
+                       } 
+                       ep->stopped = 1;
+                       s3c_udc_ep_set_stall(ep);
+               }
+
+               s3c_udc_ep0_zlp();
+               return 0;
+       }
+
+       return 1;
+}
+
+/*
+ * WAIT_FOR_SETUP (OUT_PKT_RDY)
+ */
+static void s3c_ep0_setup(struct s3c_udc *dev)
+{
+       struct s3c_ep *ep = &dev->ep[0];
+       int i, bytes, is_in;
+       u8 ep_num;
+
+       /* Nuke all previous transfers */
+       nuke(ep, -EPROTO);
+
+       /* read control req from fifo (8 bytes) */
+       bytes = s3c_fifo_read(ep, (u32 *)usb_ctrl, 8);
+
+       DEBUG_SETUP("%s: bRequestType = 0x%x(%s), bRequest = 0x%x"
+                       "\twLength = 0x%x, wValue = 0x%x, wIndex= 0x%x\n",
+                       __func__, usb_ctrl->bRequestType,
+                       (usb_ctrl->bRequestType & USB_DIR_IN) ? "IN" : "OUT", usb_ctrl->bRequest,
+                       usb_ctrl->wLength, usb_ctrl->wValue, usb_ctrl->wIndex);
+
+       if (usb_ctrl->bRequest == GET_MAX_LUN_REQUEST && usb_ctrl->wLength != 1) {
+               DEBUG_SETUP("\t%s:GET_MAX_LUN_REQUEST:invalid wLength = %d, setup returned\n",
+                       __func__, usb_ctrl->wLength);
+
+               s3c_udc_ep0_set_stall(ep);
+               dev->ep0state = WAIT_FOR_SETUP;
+
+               return;
+       }
+       else if (usb_ctrl->bRequest == BOT_RESET_REQUEST && usb_ctrl->wLength != 0) {
+               /* Bulk-Only *mass storge reset of class-specific request */ 
+               DEBUG_SETUP("\t%s:BOT Rest:invalid wLength = %d, setup returned\n",
+                       __func__, usb_ctrl->wLength);
+
+               s3c_udc_ep0_set_stall(ep);
+               dev->ep0state = WAIT_FOR_SETUP;
+
+               return;
+       }
+
+       /* Set direction of EP0 */
+       if (likely(usb_ctrl->bRequestType & USB_DIR_IN)) {
+               ep->bEndpointAddress |= USB_DIR_IN;
+               is_in = 1;
+
+       } else {
+               ep->bEndpointAddress &= ~USB_DIR_IN;
+               is_in = 0;
+       }
+       /* cope with automagic for some standard requests. */
+       dev->req_std = (usb_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD;
+       dev->req_config = 0;
+       dev->req_pending = 1;
+
+       /* Handle some SETUP packets ourselves */
+       switch (usb_ctrl->bRequest) {
+       case USB_REQ_SET_ADDRESS:
+       DEBUG_SETUP("%s: *** USB_REQ_SET_ADDRESS (%d)\n",
+                       __func__, usb_ctrl->wValue);
+
+               if (usb_ctrl->bRequestType
+                       != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
+                       break;
+
+               udc_set_address(dev, usb_ctrl->wValue);
+               return;
+
+       case USB_REQ_SET_CONFIGURATION :
+               DEBUG_SETUP("============================================\n");
+               DEBUG_SETUP("%s: USB_REQ_SET_CONFIGURATION (%d)\n",
+                               __func__, usb_ctrl->wValue);
+
+               if (usb_ctrl->bRequestType == USB_RECIP_DEVICE) {
+                       reset_available = 1;
+                       dev->req_config = 1;
+               }
+               break;
+
+       case USB_REQ_GET_DESCRIPTOR:
+               DEBUG_SETUP("%s: *** USB_REQ_GET_DESCRIPTOR  \n",__func__);
+               break;
+
+       case USB_REQ_SET_INTERFACE:
+               DEBUG_SETUP("%s: *** USB_REQ_SET_INTERFACE (%d)\n",
+                               __func__, usb_ctrl->wValue);
+
+               if (usb_ctrl->bRequestType == USB_RECIP_INTERFACE) {
+                       reset_available = 1;
+                       dev->req_config = 1;
+               }
+               break;
+
+       case USB_REQ_GET_CONFIGURATION:
+               DEBUG_SETUP("%s: *** USB_REQ_GET_CONFIGURATION  \n",__func__);
+               break;
+
+       case USB_REQ_GET_STATUS:
+               if (dev->req_std) {
+                       if (!s3c_udc_get_status(dev, usb_ctrl)) {
+                               return;
+                       }
+               }
+               break;
+
+       case USB_REQ_CLEAR_FEATURE:
+               ep_num = usb_ctrl->wIndex & 0x7f;
+
+               if (!s3c_udc_clear_feature(&dev->ep[ep_num].ep)) {
+                       return;
+               }
+               break;
+
+       case USB_REQ_SET_FEATURE:
+               ep_num = usb_ctrl->wIndex & 0x7f;
+
+               if (!s3c_udc_set_feature(&dev->ep[ep_num].ep)) {
+                       return;
+               }
+               break;
+
+       default:
+               DEBUG_SETUP("%s: *** Default of usb_ctrl.bRequest=0x%x happened.\n",
+                               __func__, usb_ctrl->bRequest);
+               break;
+       }
+
+       if (likely(dev->driver)) {
+               /* device-2-host (IN) or no data setup command,
+                * process immediately */
+               DEBUG_SETUP("%s: usb_ctrlrequest will be passed to fsg_setup()\n", __func__);
+
+               spin_unlock(&dev->lock);
+               i = dev->driver->setup(&dev->gadget, usb_ctrl);
+               spin_lock(&dev->lock);
+
+               if (i < 0) {
+                       if (dev->req_config) {
+                               DEBUG_SETUP("\tconfig change 0x%02x fail %d?\n",
+                                       (u32)usb_ctrl->bRequest, i);
+                               return;
+                       }
+
+                       /* setup processing failed, force stall */
+                       s3c_udc_ep0_set_stall(ep);
+                       dev->ep0state = WAIT_FOR_SETUP;
+
+                       DEBUG_SETUP("\tdev->driver->setup failed (%d), bRequest = %d\n",
+                               i, usb_ctrl->bRequest);
+
+
+               } else if (dev->req_pending) {
+                       dev->req_pending = 0;
+                       DEBUG_SETUP("\tdev->req_pending... \n");
+               }
+
+               DEBUG_SETUP("\tep0state = %s\n", state_names[dev->ep0state]);
+
+       }
+}
+
+/*
+ * handle ep0 interrupt
+ */
+static void s3c_handle_ep0(struct s3c_udc *dev)
+{
+       if (dev->ep0state == WAIT_FOR_SETUP) {
+               DEBUG_OUT_EP("%s: WAIT_FOR_SETUP\n", __func__);
+               s3c_ep0_setup(dev);
+
+       } else {
+               DEBUG_OUT_EP("%s: strange state!!(state = %s)\n",
+                       __func__, state_names[dev->ep0state]);
+       }
+}
+
+static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep)
+{
+       DEBUG_EP0("%s: ep_is_in = %d\n", __func__, ep_is_in(ep));
+       if (ep_is_in(ep)) {
+               dev->ep0state = DATA_STATE_XMIT;
+               s3c_ep0_write(dev);
+
+       } else {
+               dev->ep0state = DATA_STATE_RECV;
+               s3c_ep0_read(dev);
+       }
+}