usb: renesas_usbhs: Add Renesas USBHS Gadget
authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tue, 5 Apr 2011 02:40:54 +0000 (11:40 +0900)
committerGreg Kroah-Hartman <gregkh@suse.de>
Wed, 13 Apr 2011 23:07:07 +0000 (16:07 -0700)
This patch add usb gadget code to SuperH USBHS.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/gadget/Kconfig
drivers/usb/gadget/gadget_chips.h
drivers/usb/renesas_usbhs/Makefile
drivers/usb/renesas_usbhs/mod.c
drivers/usb/renesas_usbhs/mod.h
drivers/usb/renesas_usbhs/mod_gadget.c [new file with mode: 0644]

index bc5123cf41c2d36e21d6114e76f3d05a07286186..4c02b9f1597e202a6a0ef5798446fe1e8771e668 100644 (file)
@@ -260,6 +260,24 @@ config USB_R8A66597
        default USB_GADGET
        select USB_GADGET_SELECTED
 
+config USB_GADGET_RENESAS_USBHS
+       boolean "Renesas USBHS"
+       depends on USB_RENESAS_USBHS
+       select USB_GADGET_DUALSPEED
+       help
+          Renesas USBHS is a discrete USB host and peripheral controller
+          chip that supports both full and high speed USB 2.0 data transfers.
+          platform is able to configure endpoint (pipe) style
+
+          Say "y" to enable the gadget specific portion of the USBHS driver.
+
+
+config USB_RENESAS_USBHS_UDC
+       tristate
+       depends on USB_GADGET_RENESAS_USBHS
+       default USB_GADGET
+       select USB_GADGET_SELECTED
+
 config USB_GADGET_PXA27X
        boolean "PXA 27x"
        depends on ARCH_PXA && (PXA27x || PXA3xx)
index e896f6359dfecd17c57660cd98fd646fbd19d4ba..ec3fd979c71ddfced2638676f3dfa0c10440b8d6 100644 (file)
 #define gadget_is_ci13xxx_msm(g)       0
 #endif
 
+#ifdef CONFIG_USB_GADGET_RENESAS_USBHS
+#define        gadget_is_renesas_usbhs(g) (!strcmp("renesas_usbhs_udc", (g)->name))
+#else
+#define        gadget_is_renesas_usbhs(g) 0
+#endif
+
 /**
  * usb_gadget_controller_number - support bcdDevice id convention
  * @gadget: the controller being driven
@@ -207,6 +213,9 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
                return 0x27;
        else if (gadget_is_ci13xxx_msm(gadget))
                return 0x28;
+       else if (gadget_is_renesas_usbhs(gadget))
+               return 0x29;
+
        return -ENOENT;
 }
 
index d76f3dd3b9d163deb07adde31666df1c47ff0470..b8798ad16278ee8146c5f7e2bbf4930a3b8f8f72 100644 (file)
@@ -5,3 +5,5 @@
 obj-$(CONFIG_USB_RENESAS_USBHS)        += renesas_usbhs.o
 
 renesas_usbhs-y                        := common.o mod.o pipe.o
+
+renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_UDC)  += mod_gadget.o
index 4a3398484cd73320902179291bbf2d01c5ad10fc..73604a1d68434dfdd51408fecef67300721fa7ac 100644 (file)
@@ -94,17 +94,32 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
        struct device *dev = usbhs_priv_to_dev(priv);
        int ret;
 
+       /*
+        * install host/gadget driver
+        */
+       ret = usbhs_mod_gadget_probe(priv);
+       if (ret < 0)
+               return ret;
+
        /* irq settings */
        ret = request_irq(priv->irq, usbhs_interrupt,
                          IRQF_DISABLED, dev_name(dev), priv);
-       if (ret)
+       if (ret) {
                dev_err(dev, "irq request err\n");
+               goto mod_init_gadget_err;
+       }
+
+       return ret;
+
+mod_init_gadget_err:
+       usbhs_mod_gadget_remove(priv);
 
        return ret;
 }
 
 void usbhs_mod_remove(struct usbhs_priv *priv)
 {
+       usbhs_mod_gadget_remove(priv);
        free_irq(priv->irq, priv);
 }
 
index bd873d5b432a3e9438d24ebfec4d90f716943593..8644191e164f2ff3304c3054967c8848cf92ebcd 100644 (file)
@@ -103,4 +103,20 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
                 mod->func(param);                      \
        })
 
+/*
+ * gadget control
+ */
+#ifdef CONFIG_USB_RENESAS_USBHS_UDC
+extern int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv);
+extern void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv);
+#else
+static inline int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
+{
+       return 0;
+}
+static inline void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
+{
+}
+#endif
+
 #endif /* RENESAS_USB_MOD_H */
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
new file mode 100644 (file)
index 0000000..9a5ac02
--- /dev/null
@@ -0,0 +1,1341 @@
+/*
+ * Renesas USB driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include "common.h"
+
+/*
+ *             struct
+ */
+struct usbhsg_request {
+       struct usb_request      req;
+       struct list_head        node;
+};
+
+#define EP_NAME_SIZE 8
+struct usbhsg_gpriv;
+struct usbhsg_pipe_handle;
+struct usbhsg_uep {
+       struct usb_ep            ep;
+       struct usbhs_pipe       *pipe;
+       struct list_head         list;
+
+       char ep_name[EP_NAME_SIZE];
+
+       struct usbhsg_gpriv *gpriv;
+       struct usbhsg_pipe_handle *handler;
+};
+
+struct usbhsg_gpriv {
+       struct usb_gadget        gadget;
+       struct usbhs_mod         mod;
+
+       struct usbhsg_uep       *uep;
+       int                      uep_size;
+
+       struct usb_gadget_driver        *driver;
+
+       u32     status;
+#define USBHSG_STATUS_STARTED          (1 << 0)
+#define USBHSG_STATUS_REGISTERD                (1 << 1)
+#define USBHSG_STATUS_WEDGE            (1 << 2)
+};
+
+struct usbhsg_pipe_handle {
+       int (*prepare)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
+       int (*try_run)(struct usbhsg_uep *uep, struct usbhsg_request *ureq);
+       void (*irq_mask)(struct usbhsg_uep *uep, int enable);
+};
+
+struct usbhsg_recip_handle {
+       char *name;
+       int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
+                     struct usb_ctrlrequest *ctrl);
+       int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
+                        struct usb_ctrlrequest *ctrl);
+       int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
+                       struct usb_ctrlrequest *ctrl);
+};
+
+/*
+ *             macro
+ */
+#define usbhsg_priv_to_gpriv(priv)                     \
+       container_of(                                   \
+               usbhs_mod_get(priv, USBHS_GADGET),      \
+               struct usbhsg_gpriv, mod)
+
+#define __usbhsg_for_each_uep(start, pos, g, i)        \
+       for (i = start, pos = (g)->uep;         \
+            i < (g)->uep_size;                 \
+            i++, pos = (g)->uep + i)
+
+#define usbhsg_for_each_uep(pos, gpriv, i)     \
+       __usbhsg_for_each_uep(1, pos, gpriv, i)
+
+#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i)    \
+       __usbhsg_for_each_uep(0, pos, gpriv, i)
+
+#define usbhsg_gadget_to_gpriv(g)\
+       container_of(g, struct usbhsg_gpriv, gadget)
+
+#define usbhsg_req_to_ureq(r)\
+       container_of(r, struct usbhsg_request, req)
+
+#define usbhsg_ep_to_uep(e)            container_of(e, struct usbhsg_uep, ep)
+#define usbhsg_gpriv_to_lock(gp)       usbhs_priv_to_lock((gp)->mod.priv)
+#define usbhsg_gpriv_to_dev(gp)                usbhs_priv_to_dev((gp)->mod.priv)
+#define usbhsg_gpriv_to_priv(gp)       ((gp)->mod.priv)
+#define usbhsg_gpriv_to_dcp(gp)                ((gp)->uep)
+#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
+#define usbhsg_uep_to_gpriv(u)         ((u)->gpriv)
+#define usbhsg_uep_to_pipe(u)          ((u)->pipe)
+#define usbhsg_pipe_to_uep(p)          ((p)->mod_private)
+#define usbhsg_is_dcp(u)               ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
+
+#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
+
+/* status */
+#define usbhsg_status_init(gp)   do {(gp)->status = 0; } while (0)
+#define usbhsg_status_set(gp, b) (gp->status |=  b)
+#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
+#define usbhsg_status_has(gp, b) (gp->status &   b)
+
+/*
+ *             list push/pop
+ */
+static void usbhsg_queue_push(struct usbhsg_uep *uep,
+                             struct usbhsg_request *ureq)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+       /*
+        *********  assume under spin lock  *********
+        */
+       list_del_init(&ureq->node);
+       list_add_tail(&ureq->node, &uep->list);
+       ureq->req.actual = 0;
+       ureq->req.status = -EINPROGRESS;
+
+       dev_dbg(dev, "pipe %d : queue push (%d)\n",
+               usbhs_pipe_number(pipe),
+               ureq->req.length);
+}
+
+static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
+{
+       /*
+        *********  assume under spin lock  *********
+        */
+       if (list_empty(&uep->list))
+               return NULL;
+
+       return list_entry(uep->list.next, struct usbhsg_request, node);
+}
+
+#define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
+#define usbhsg_queue_handle(uep)  __usbhsg_queue_handler(uep, 0);
+static int __usbhsg_queue_handler(struct usbhsg_uep *uep, int prepare)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       struct usbhsg_request *ureq;
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int is_locked;
+       int ret = 0;
+
+       if (!uep->handler) {
+               dev_err(dev, "no handler function\n");
+               return -EIO;
+       }
+
+       /*
+        * CAUTION [*queue handler*]
+        *
+        * This function will be called for start/restart queue operation.
+        * OTOH the most much worry for USB driver is spinlock nest.
+        * Specially it are
+        *   - usb_ep_ops  :: queue
+        *   - usb_request :: complete
+        *
+        * But the caller of this function need not care about spinlock.
+        * This function is using spin_trylock_irqsave for it.
+        * if "is_locked" is 1, this mean this function lock it.
+        * but if it is 0, this mean it is already under spin lock.
+        * see also
+        *   CAUTION [*endpoint queue*]
+        *   CAUTION [*request complete*]
+        */
+
+       /******************  spin try lock *******************/
+       is_locked = spin_trylock_irqsave(lock, flags);
+       ureq = usbhsg_queue_get(uep);
+       if (ureq) {
+               if (prepare)
+                       ret = uep->handler->prepare(uep, ureq);
+               else
+                       ret = uep->handler->try_run(uep, ureq);
+       }
+       if (is_locked)
+               spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       return ret;
+}
+
+static void usbhsg_queue_pop(struct usbhsg_uep *uep,
+                            struct usbhsg_request *ureq,
+                            int status)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       /*
+        * CAUTION [*request complete*]
+        *
+        * There is a possibility not to be called in correct order
+        * if "complete" is called without spinlock.
+        *
+        * So, this function assume it is under spinlock,
+        * and call usb_request :: complete.
+        *
+        * But this "complete" will push next usb_request.
+        * It mean "usb_ep_ops :: queue" which is using spinlock is called
+        * under spinlock.
+        *
+        * To avoid dead-lock, this driver is using spin_trylock.
+        *   CAUTION [*endpoint queue*]
+        *   CAUTION [*queue handler*]
+        */
+
+       dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
+
+       list_del_init(&ureq->node);
+
+       ureq->req.status = status;
+       ureq->req.complete(&uep->ep, &ureq->req);
+
+       /* more request ? */
+       if (0 == status)
+               usbhsg_queue_prepare(uep);
+}
+
+/*
+ *             irq enable/disable function
+ */
+#define usbhsg_irq_callback_ctrl(uep, status, enable)                  \
+       ({                                                              \
+               struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);  \
+               struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);      \
+               struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);  \
+               struct usbhs_mod *mod = usbhs_mod_get_current(priv);    \
+               if (!mod)                                               \
+                       return;                                         \
+               if (enable)                                             \
+                       mod->irq_##status |= (1 << usbhs_pipe_number(pipe)); \
+               else                                                    \
+                       mod->irq_##status &= ~(1 << usbhs_pipe_number(pipe)); \
+               usbhs_irq_callback_update(priv, mod);                   \
+       })
+
+static void usbhsg_irq_empty_ctrl(struct usbhsg_uep *uep, int enable)
+{
+       usbhsg_irq_callback_ctrl(uep, bempsts, enable);
+}
+
+static void usbhsg_irq_ready_ctrl(struct usbhsg_uep *uep, int enable)
+{
+       usbhsg_irq_callback_ctrl(uep, brdysts, enable);
+}
+
+/*
+ *             handler function
+ */
+static int usbhsg_try_run_ctrl_stage_end(struct usbhsg_uep *uep,
+                                        struct usbhsg_request *ureq)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       usbhs_dcp_control_transfer_done(pipe);
+       usbhsg_queue_pop(uep, ureq, 0);
+
+       return 0;
+}
+
+static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
+                                     struct usbhsg_request *ureq)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       struct usb_request *req = &ureq->req;
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       void *buf;
+       int remainder, send;
+       int is_done = 0;
+       int enable;
+       int maxp;
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       maxp            = usbhs_pipe_get_maxpacket(pipe);
+       buf             = req->buf    + req->actual;
+       remainder       = req->length - req->actual;
+
+       send = usbhs_fifo_write(pipe, buf, remainder);
+
+       /*
+        * send < 0 : pipe busy
+        * send = 0 : send zero packet
+        * send > 0 : send data
+        *
+        * send <= max_packet
+        */
+       if (send > 0)
+               req->actual += send;
+
+       /* send all packet ? */
+       if (send < remainder)
+               is_done = 0;            /* there are remainder data */
+       else if (send < maxp)
+               is_done = 1;            /* short packet */
+       else
+               is_done = !req->zero;   /* send zero packet ? */
+
+       dev_dbg(dev, "  send %d (%d/ %d/ %d/ %d)\n",
+               usbhs_pipe_number(pipe),
+               remainder, send, is_done, req->zero);
+
+       /*
+        * enable interrupt and send again in irq handler
+        * if it still have remainder data which should be sent.
+        */
+       enable = !is_done;
+       uep->handler->irq_mask(uep, enable);
+
+       /*
+        * usbhs_fifo_enable execute
+        *  - after callback_update,
+        *  - before queue_pop / stage_end
+        */
+       usbhs_fifo_enable(pipe);
+
+       /*
+        * all data were sent ?
+        */
+       if (is_done) {
+               /* it care below call in
+                  "function mode" */
+               if (usbhsg_is_dcp(uep))
+                       usbhs_dcp_control_transfer_done(pipe);
+
+               usbhsg_queue_pop(uep, ureq, 0);
+       }
+
+       return 0;
+}
+
+static int usbhsg_prepare_send_packet(struct usbhsg_uep *uep,
+                                     struct usbhsg_request *ureq)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       usbhs_fifo_prepare_write(pipe);
+       usbhsg_try_run_send_packet(uep, ureq);
+
+       return 0;
+}
+
+static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
+                                        struct usbhsg_request *ureq)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       struct usb_request *req = &ureq->req;
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       void *buf;
+       int maxp;
+       int remainder, recv;
+       int is_done = 0;
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       maxp            = usbhs_pipe_get_maxpacket(pipe);
+       buf             = req->buf    + req->actual;
+       remainder       = req->length - req->actual;
+
+       recv = usbhs_fifo_read(pipe, buf, remainder);
+       /*
+        * recv < 0  : pipe busy
+        * recv >= 0 : receive data
+        *
+        * recv <= max_packet
+        */
+       if (recv < 0)
+               return -EBUSY;
+
+       /* update parameters */
+       req->actual += recv;
+
+       if ((recv == remainder) ||      /* receive all data */
+           (recv < maxp))              /* short packet */
+               is_done = 1;
+
+       dev_dbg(dev, "  recv %d (%d/ %d/ %d/ %d)\n",
+               usbhs_pipe_number(pipe),
+               remainder, recv, is_done, req->zero);
+
+       /* read all data ? */
+       if (is_done) {
+               int disable = 0;
+
+               uep->handler->irq_mask(uep, disable);
+               usbhs_fifo_disable(pipe);
+               usbhsg_queue_pop(uep, ureq, 0);
+       }
+
+       return 0;
+}
+
+static int usbhsg_prepare_receive_packet(struct usbhsg_uep *uep,
+                                        struct usbhsg_request *ureq)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       int enable = 1;
+       int ret;
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       ret = usbhs_fifo_prepare_read(pipe);
+       if (ret < 0)
+               return ret;
+
+       /*
+        * data will be read in interrupt handler
+        */
+       uep->handler->irq_mask(uep, enable);
+
+       return ret;
+}
+
+static struct usbhsg_pipe_handle usbhsg_handler_send_by_empty = {
+       .prepare        = usbhsg_prepare_send_packet,
+       .try_run        = usbhsg_try_run_send_packet,
+       .irq_mask       = usbhsg_irq_empty_ctrl,
+};
+
+static struct usbhsg_pipe_handle usbhsg_handler_send_by_ready = {
+       .prepare        = usbhsg_prepare_send_packet,
+       .try_run        = usbhsg_try_run_send_packet,
+       .irq_mask       = usbhsg_irq_ready_ctrl,
+};
+
+static struct usbhsg_pipe_handle usbhsg_handler_recv_by_ready = {
+       .prepare        = usbhsg_prepare_receive_packet,
+       .try_run        = usbhsg_try_run_receive_packet,
+       .irq_mask       = usbhsg_irq_ready_ctrl,
+};
+
+static struct usbhsg_pipe_handle usbhsg_handler_ctrl_stage_end = {
+       .prepare        = usbhsg_try_run_ctrl_stage_end,
+       .try_run        = usbhsg_try_run_ctrl_stage_end,
+};
+
+/*
+ * DCP pipe can NOT use "ready interrupt" for "send"
+ * it should use "empty" interrupt.
+ * see
+ *   "Operation" - "Interrupt Function" - "BRDY Interrupt"
+ *
+ * on the other hand, normal pipe can use "ready interrupt" for "send"
+ * even though it is single/double buffer
+ */
+#define usbhsg_handler_send_ctrl       usbhsg_handler_send_by_empty
+#define usbhsg_handler_recv_ctrl       usbhsg_handler_recv_by_ready
+
+#define usbhsg_handler_send_packet     usbhsg_handler_send_by_ready
+#define usbhsg_handler_recv_packet     usbhsg_handler_recv_by_ready
+
+/*
+ *             USB_TYPE_STANDARD / clear feature functions
+ */
+static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
+                                                struct usbhsg_uep *uep,
+                                                struct usb_ctrlrequest *ctrl)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
+
+       usbhs_dcp_control_transfer_done(pipe);
+
+       return 0;
+}
+
+static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
+                                                  struct usbhsg_uep *uep,
+                                                  struct usb_ctrlrequest *ctrl)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+       if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
+               usbhs_fifo_disable(pipe);
+               usbhs_pipe_clear_sequence(pipe);
+               usbhs_fifo_enable(pipe);
+       }
+
+       usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
+
+       usbhsg_queue_prepare(uep);
+
+       return 0;
+}
+
+struct usbhsg_recip_handle req_clear_feature = {
+       .name           = "clear feature",
+       .device         = usbhsg_recip_handler_std_control_done,
+       .interface      = usbhsg_recip_handler_std_control_done,
+       .endpoint       = usbhsg_recip_handler_std_clear_endpoint,
+};
+
+/*
+ *             USB_TYPE handler
+ */
+static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
+                                  struct usbhsg_recip_handle *handler,
+                                  struct usb_ctrlrequest *ctrl)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       struct usbhsg_uep *uep;
+       int recip = ctrl->bRequestType & USB_RECIP_MASK;
+       int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+       int ret;
+       int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
+                   struct usb_ctrlrequest *ctrl);
+       char *msg;
+
+       uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
+
+       switch (recip) {
+       case USB_RECIP_DEVICE:
+               msg     = "DEVICE";
+               func    = handler->device;
+               break;
+       case USB_RECIP_INTERFACE:
+               msg     = "INTERFACE";
+               func    = handler->interface;
+               break;
+       case USB_RECIP_ENDPOINT:
+               msg     = "ENDPOINT";
+               func    = handler->endpoint;
+               break;
+       default:
+               dev_warn(dev, "unsupported RECIP(%d)\n", recip);
+               func = NULL;
+               ret = -EINVAL;
+       }
+
+       if (func) {
+               dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
+               ret = func(priv, uep, ctrl);
+       }
+
+       return ret;
+}
+
+/*
+ *             irq functions
+ *
+ * it will be called from usbhs_interrupt
+ */
+static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
+                               struct usbhs_irq_state *irq_state)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+
+       gpriv->gadget.speed = usbhs_status_get_usb_speed(irq_state);
+
+       dev_dbg(dev, "state = %x : speed : %d\n",
+               usbhs_status_get_device_state(irq_state),
+               gpriv->gadget.speed);
+
+       return 0;
+}
+
+static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
+                                struct usbhs_irq_state *irq_state)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       struct usb_ctrlrequest ctrl;
+       struct usbhsg_recip_handle *recip_handler = NULL;
+       int stage = usbhs_status_get_ctrl_stage(irq_state);
+       int ret = 0;
+
+       dev_dbg(dev, "stage = %d\n", stage);
+
+       /*
+        * see Manual
+        *
+        *  "Operation"
+        *  - "Interrupt Function"
+        *    - "Control Transfer Stage Transition Interrupt"
+        *      - Fig. "Control Transfer Stage Transitions"
+        */
+
+       switch (stage) {
+       case READ_DATA_STAGE:
+               dcp->handler = &usbhsg_handler_send_ctrl;
+               break;
+       case WRITE_DATA_STAGE:
+               dcp->handler = &usbhsg_handler_recv_ctrl;
+               break;
+       case NODATA_STATUS_STAGE:
+               dcp->handler = &usbhsg_handler_ctrl_stage_end;
+               break;
+       default:
+               return ret;
+       }
+
+       /*
+        * get usb request
+        */
+       usbhs_usbreq_get_val(priv, &ctrl);
+
+       switch (ctrl.bRequestType & USB_TYPE_MASK) {
+       case USB_TYPE_STANDARD:
+               switch (ctrl.bRequest) {
+               case USB_REQ_CLEAR_FEATURE:
+                       recip_handler = &req_clear_feature;
+                       break;
+               }
+       }
+
+       /*
+        * setup stage / run recip
+        */
+       if (recip_handler)
+               ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
+       else
+               ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
+
+       if (ret < 0)
+               usbhs_fifo_stall(pipe);
+
+       return ret;
+}
+
+static int usbhsg_irq_empty(struct usbhs_priv *priv,
+                           struct usbhs_irq_state *irq_state)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhsg_uep *uep;
+       struct usbhs_pipe *pipe;
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       int i, ret;
+
+       if (!irq_state->bempsts) {
+               dev_err(dev, "debug %s !!\n", __func__);
+               return -EIO;
+       }
+
+       dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
+
+       /*
+        * search interrupted "pipe"
+        * not "uep".
+        */
+       usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+               if (!(irq_state->bempsts & (1 << i)))
+                       continue;
+
+               uep     = usbhsg_pipe_to_uep(pipe);
+               ret     = usbhsg_queue_handle(uep);
+               if (ret < 0)
+                       dev_err(dev, "send error %d : %d\n", i, ret);
+       }
+
+       return 0;
+}
+
+static int usbhsg_irq_ready(struct usbhs_priv *priv,
+                           struct usbhs_irq_state *irq_state)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhsg_uep *uep;
+       struct usbhs_pipe *pipe;
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       int i, ret;
+
+       if (!irq_state->brdysts) {
+               dev_err(dev, "debug %s !!\n", __func__);
+               return -EIO;
+       }
+
+       dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
+
+       /*
+        * search interrupted "pipe"
+        * not "uep".
+        */
+       usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+               if (!(irq_state->brdysts & (1 << i)))
+                       continue;
+
+               uep     = usbhsg_pipe_to_uep(pipe);
+               ret     = usbhsg_queue_handle(uep);
+               if (ret < 0)
+                       dev_err(dev, "receive error %d : %d\n", i, ret);
+       }
+
+       return 0;
+}
+
+/*
+ *
+ *             usb_dcp_ops
+ *
+ */
+static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
+       struct usbhs_pipe *pipe;
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       pipe = usbhs_dcp_malloc(priv);
+       if (!pipe)
+               return -EIO;
+
+       uep->pipe               = pipe;
+       uep->pipe->mod_private  = uep;
+       INIT_LIST_HEAD(&uep->list);
+
+       return 0;
+}
+
+#define usbhsg_dcp_disable usbhsg_pipe_disable
+static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
+{
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       struct usbhsg_request *ureq;
+       int disable = 0;
+
+       /*
+        *********  assume under spin lock  *********
+        */
+
+       usbhs_fifo_disable(pipe);
+
+       /*
+        * disable pipe irq
+        */
+       usbhsg_irq_empty_ctrl(uep, disable);
+       usbhsg_irq_ready_ctrl(uep, disable);
+
+       while (1) {
+               ureq = usbhsg_queue_get(uep);
+               if (!ureq)
+                       break;
+
+               usbhsg_queue_pop(uep, ureq, -ECONNRESET);
+       }
+
+       uep->pipe->mod_private  = NULL;
+       uep->pipe               = NULL;
+
+       return 0;
+}
+
+/*
+ *
+ *             usb_ep_ops
+ *
+ */
+static int usbhsg_ep_enable(struct usb_ep *ep,
+                        const struct usb_endpoint_descriptor *desc)
+{
+       struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
+       struct usbhs_pipe *pipe;
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int ret = -EIO;
+
+       /********************  spin lock ********************/
+       spin_lock_irqsave(lock, flags);
+
+       pipe = usbhs_pipe_malloc(priv, desc);
+       if (pipe) {
+               uep->pipe               = pipe;
+               pipe->mod_private       = uep;
+               INIT_LIST_HEAD(&uep->list);
+
+               if (usb_endpoint_dir_in(desc))
+                       uep->handler = &usbhsg_handler_send_packet;
+               else
+                       uep->handler = &usbhsg_handler_recv_packet;
+
+               ret = 0;
+       }
+       spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       return ret;
+}
+
+static int usbhsg_ep_disable(struct usb_ep *ep)
+{
+       struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int ret;
+
+       /********************  spin lock ********************/
+       spin_lock_irqsave(lock, flags);
+       ret = usbhsg_pipe_disable(uep);
+       spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       return ret;
+}
+
+static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
+                                                  gfp_t gfp_flags)
+{
+       struct usbhsg_request *ureq;
+
+       ureq = kzalloc(sizeof *ureq, gfp_flags);
+       if (!ureq)
+               return NULL;
+
+       INIT_LIST_HEAD(&ureq->node);
+       return &ureq->req;
+}
+
+static void usbhsg_ep_free_request(struct usb_ep *ep,
+                                  struct usb_request *req)
+{
+       struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
+
+       WARN_ON(!list_empty(&ureq->node));
+       kfree(ureq);
+}
+
+static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
+                         gfp_t gfp_flags)
+{
+       struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int ret = 0;
+       int is_locked;
+
+       /*
+        * CAUTION [*endpoint queue*]
+        *
+        * This function will be called from usb_request :: complete
+        * or usb driver timing.
+        * If this function is called from usb_request :: complete,
+        * it is already under spinlock on this driver.
+        * but it is called frm usb driver, this function should call spinlock.
+        *
+        * This function is using spin_trylock_irqsave to solve this issue.
+        * if "is_locked" is 1, this mean this function lock it.
+        * but if it is 0, this mean it is already under spin lock.
+        * see also
+        *   CAUTION [*queue handler*]
+        *   CAUTION [*request complete*]
+        */
+
+       /********************  spin lock ********************/
+       is_locked = spin_trylock_irqsave(lock, flags);
+
+       /* param check */
+       if (usbhsg_is_not_connected(gpriv)      ||
+           unlikely(!gpriv->driver)            ||
+           unlikely(!pipe))
+               ret = -ESHUTDOWN;
+       else
+               usbhsg_queue_push(uep, ureq);
+
+       if (is_locked)
+               spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       usbhsg_queue_prepare(uep);
+
+       return ret;
+}
+
+static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
+{
+       struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
+       struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int is_locked;
+
+       /*
+        * see
+        *   CAUTION [*queue handler*]
+        *   CAUTION [*endpoint queue*]
+        *   CAUTION [*request complete*]
+        */
+
+       /********************  spin lock ********************/
+       is_locked = spin_trylock_irqsave(lock, flags);
+
+       usbhsg_queue_pop(uep, ureq, -ECONNRESET);
+
+       if (is_locked)
+               spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       return 0;
+}
+
+static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
+{
+       struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
+       struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+       struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+       int ret = -EAGAIN;
+       int is_locked;
+
+       /*
+        * see
+        *   CAUTION [*queue handler*]
+        *   CAUTION [*endpoint queue*]
+        *   CAUTION [*request complete*]
+        */
+
+       /********************  spin lock ********************/
+       is_locked = spin_trylock_irqsave(lock, flags);
+       if (!usbhsg_queue_get(uep)) {
+
+               dev_dbg(dev, "set halt %d (pipe %d)\n",
+                       halt, usbhs_pipe_number(pipe));
+
+               if (halt)
+                       usbhs_fifo_stall(pipe);
+               else
+                       usbhs_fifo_disable(pipe);
+
+               if (halt && wedge)
+                       usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
+               else
+                       usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
+
+               ret = 0;
+       }
+
+       if (is_locked)
+               spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ******************/
+
+       return ret;
+}
+
+static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
+{
+       return __usbhsg_ep_set_halt_wedge(ep, value, 0);
+}
+
+static int usbhsg_ep_set_wedge(struct usb_ep *ep)
+{
+       return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
+}
+
+static struct usb_ep_ops usbhsg_ep_ops = {
+       .enable         = usbhsg_ep_enable,
+       .disable        = usbhsg_ep_disable,
+
+       .alloc_request  = usbhsg_ep_alloc_request,
+       .free_request   = usbhsg_ep_free_request,
+
+       .queue          = usbhsg_ep_queue,
+       .dequeue        = usbhsg_ep_dequeue,
+
+       .set_halt       = usbhsg_ep_set_halt,
+       .set_wedge      = usbhsg_ep_set_wedge,
+};
+
+/*
+ *             usb module start/end
+ */
+static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
+       struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+       struct device *dev = usbhs_priv_to_dev(priv);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+
+       /********************  spin lock ********************/
+       spin_lock_irqsave(lock, flags);
+
+       /*
+        * enable interrupt and systems if ready
+        */
+       usbhsg_status_set(gpriv, status);
+       if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
+             usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
+               goto usbhsg_try_start_unlock;
+
+       dev_dbg(dev, "start gadget\n");
+
+       /*
+        * pipe initialize and enable DCP
+        */
+       usbhs_pipe_init(priv);
+       usbhsg_dcp_enable(dcp);
+
+       /*
+        * system config enble
+        * - HI speed
+        * - function
+        * - usb module
+        */
+       usbhs_sys_hispeed_ctrl(priv, 1);
+       usbhs_sys_function_ctrl(priv, 1);
+       usbhs_sys_usb_ctrl(priv, 1);
+
+       /*
+        * enable irq callback
+        */
+       mod->irq_dev_state      = usbhsg_irq_dev_state;
+       mod->irq_ctrl_stage     = usbhsg_irq_ctrl_stage;
+       mod->irq_empty          = usbhsg_irq_empty;
+       mod->irq_ready          = usbhsg_irq_ready;
+       mod->irq_bempsts        = 0;
+       mod->irq_brdysts        = 0;
+       usbhs_irq_callback_update(priv, mod);
+
+usbhsg_try_start_unlock:
+       spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ********************/
+
+       return 0;
+}
+
+static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+       struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+       struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
+       struct device *dev = usbhs_priv_to_dev(priv);
+       spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+       unsigned long flags;
+
+       /********************  spin lock ********************/
+       spin_lock_irqsave(lock, flags);
+
+       /*
+        * disable interrupt and systems if 1st try
+        */
+       usbhsg_status_clr(gpriv, status);
+       if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
+           !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
+               goto usbhsg_try_stop_unlock;
+
+       /* disable all irq */
+       mod->irq_dev_state      = NULL;
+       mod->irq_ctrl_stage     = NULL;
+       mod->irq_empty          = NULL;
+       mod->irq_ready          = NULL;
+       mod->irq_bempsts        = 0;
+       mod->irq_brdysts        = 0;
+       usbhs_irq_callback_update(priv, mod);
+
+       usbhsg_dcp_disable(dcp);
+
+       gpriv->gadget.speed = USB_SPEED_UNKNOWN;
+
+       /* disable sys */
+       usbhs_sys_hispeed_ctrl(priv, 0);
+       usbhs_sys_function_ctrl(priv, 0);
+       usbhs_sys_usb_ctrl(priv, 0);
+
+       spin_unlock_irqrestore(lock, flags);
+       /********************  spin unlock ********************/
+
+       if (gpriv->driver &&
+           gpriv->driver->disconnect)
+               gpriv->driver->disconnect(&gpriv->gadget);
+
+       dev_dbg(dev, "stop gadget\n");
+
+       return 0;
+
+usbhsg_try_stop_unlock:
+       spin_unlock_irqrestore(lock, flags);
+
+       return 0;
+}
+
+/*
+ *
+ *             linux usb function
+ *
+ */
+struct usbhsg_gpriv *the_controller;
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+                           int (*bind)(struct usb_gadget *))
+{
+       struct usbhsg_gpriv *gpriv = the_controller;
+       struct usbhs_priv *priv;
+       struct device *dev;
+       int ret;
+
+       if (!bind               ||
+           !driver             ||
+           !driver->setup      ||
+           driver->speed != USB_SPEED_HIGH)
+               return -EINVAL;
+       if (!gpriv)
+               return -ENODEV;
+       if (gpriv->driver)
+               return -EBUSY;
+
+       dev  = usbhsg_gpriv_to_dev(gpriv);
+       priv = usbhsg_gpriv_to_priv(gpriv);
+
+       /* first hook up the driver ... */
+       gpriv->driver = driver;
+       gpriv->gadget.dev.driver = &driver->driver;
+
+       ret = device_add(&gpriv->gadget.dev);
+       if (ret) {
+               dev_err(dev, "device_add error %d\n", ret);
+               goto add_fail;
+       }
+
+       ret = bind(&gpriv->gadget);
+       if (ret) {
+               dev_err(dev, "bind to driver %s error %d\n",
+                       driver->driver.name, ret);
+               goto bind_fail;
+       }
+
+       dev_dbg(dev, "bind %s\n", driver->driver.name);
+
+       return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
+
+bind_fail:
+       device_del(&gpriv->gadget.dev);
+add_fail:
+       gpriv->driver = NULL;
+       gpriv->gadget.dev.driver = NULL;
+
+       return ret;
+}
+EXPORT_SYMBOL(usb_gadget_probe_driver);
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+       struct usbhsg_gpriv *gpriv = the_controller;
+       struct usbhs_priv *priv;
+       struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+
+       if (!gpriv)
+               return -ENODEV;
+
+       if (!driver             ||
+           !driver->unbind     ||
+           driver != gpriv->driver)
+               return -EINVAL;
+
+       dev  = usbhsg_gpriv_to_dev(gpriv);
+       priv = usbhsg_gpriv_to_priv(gpriv);
+
+       usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
+       device_del(&gpriv->gadget.dev);
+       gpriv->driver = NULL;
+
+       if (driver->disconnect)
+               driver->disconnect(&gpriv->gadget);
+
+       driver->unbind(&gpriv->gadget);
+       dev_dbg(dev, "unbind %s\n", driver->driver.name);
+
+       return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+/*
+ *             usb gadget ops
+ */
+static int usbhsg_get_frame(struct usb_gadget *gadget)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
+       struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
+
+       return usbhs_frame_get_num(priv);
+}
+
+static struct usb_gadget_ops usbhsg_gadget_ops = {
+       .get_frame              = usbhsg_get_frame,
+};
+
+static int usbhsg_start(struct usbhs_priv *priv)
+{
+       return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
+}
+
+static int usbhsg_stop(struct usbhs_priv *priv)
+{
+       return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
+}
+
+int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
+{
+       struct usbhsg_gpriv *gpriv;
+       struct usbhsg_uep *uep;
+       struct device *dev = usbhs_priv_to_dev(priv);
+       int pipe_size = usbhs_get_dparam(priv, pipe_size);
+       int i;
+
+       gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
+       if (!gpriv) {
+               dev_err(dev, "Could not allocate gadget priv\n");
+               return -ENOMEM;
+       }
+
+       uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
+       if (!uep) {
+               dev_err(dev, "Could not allocate ep\n");
+               goto usbhs_mod_gadget_probe_err_gpriv;
+       }
+
+       /*
+        * CAUTION
+        *
+        * There is no guarantee that it is possible to access usb module here.
+        * Don't accesses to it.
+        * The accesse will be enable after "usbhsg_start"
+        */
+
+       /*
+        * register itself
+        */
+       usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
+
+       /* init gpriv */
+       gpriv->mod.name         = "gadget";
+       gpriv->mod.start        = usbhsg_start;
+       gpriv->mod.stop         = usbhsg_stop;
+       gpriv->uep              = uep;
+       gpriv->uep_size         = pipe_size;
+       usbhsg_status_init(gpriv);
+
+       /*
+        * init gadget
+        */
+       device_initialize(&gpriv->gadget.dev);
+       dev_set_name(&gpriv->gadget.dev, "gadget");
+       gpriv->gadget.dev.parent        = dev;
+       gpriv->gadget.name              = "renesas_usbhs_udc";
+       gpriv->gadget.ops               = &usbhsg_gadget_ops;
+       gpriv->gadget.is_dualspeed      = 1;
+
+       INIT_LIST_HEAD(&gpriv->gadget.ep_list);
+
+       /*
+        * init usb_ep
+        */
+       usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
+               uep->gpriv      = gpriv;
+               snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
+
+               uep->ep.name            = uep->ep_name;
+               uep->ep.ops             = &usbhsg_ep_ops;
+               INIT_LIST_HEAD(&uep->ep.ep_list);
+               INIT_LIST_HEAD(&uep->list);
+
+               /* init DCP */
+               if (usbhsg_is_dcp(uep)) {
+                       gpriv->gadget.ep0 = &uep->ep;
+                       uep->ep.maxpacket = 64;
+               }
+               /* init normal pipe */
+               else {
+                       uep->ep.maxpacket = 512;
+                       list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
+               }
+       }
+
+       the_controller = gpriv;
+
+       dev_info(dev, "gadget probed\n");
+
+       return 0;
+
+usbhs_mod_gadget_probe_err_gpriv:
+       kfree(gpriv);
+
+       return -ENOMEM;
+}
+
+void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
+{
+       struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+
+       kfree(gpriv);
+}