Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 1385 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
new file mode 100644
index 000000000000..547486ccd059
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -0,0 +1,1385 @@
+/*
+ * 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)
+
+/*
+ *              usbhsg_trylock
+ *
+ * This driver don't use spin_try_lock
+ * to avoid warning of CONFIG_DEBUG_SPINLOCK
+ */
+static spinlock_t *usbhsg_trylock(struct usbhsg_gpriv *gpriv,
+                                  unsigned long *flags)
+{
+        spinlock_t *lock = usbhsg_gpriv_to_lock(gpriv);
+
+        /* check spin lock status
+         * to avoid deadlock/nest */
+        if (spin_is_locked(lock))
+                return NULL;
+
+        spin_lock_irqsave(lock, *flags);
+
+        return lock;
+}
+
+static void usbhsg_unlock(spinlock_t *lock, unsigned long *flags)
+{
+        if (!lock)
+                return;
+
+        spin_unlock_irqrestore(lock, *flags);
+}
+
+/*
+ *              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;
+        unsigned long flags;
+        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 usbhsg_trylock 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 *******************/
+        lock = usbhsg_trylock(gpriv, &flags);
+
+        ureq = usbhsg_queue_get(uep);
+        if (ureq) {
+                if (prepare)
+                        ret = uep->handler->prepare(uep, ureq);
+                else
+                        ret = uep->handler->try_run(uep, ureq);
+        }
+        usbhsg_unlock(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 usbhsg_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);
+        if (!usbhsg_uep_to_pipe(uep)) {
+                dev_err(dev, "wrong recip request\n");
+                return -EINVAL;
+        }
+
+        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);
+        }
+
+        return 0;
+}
+
+static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
+{
+        int i;
+        struct usbhsg_uep *uep;
+
+        usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
+                uep->pipe = NULL;
+}
+
+/*
+ *
+ *              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;
+        unsigned long flags;
+        int ret = -EIO;
+
+        /*
+         * if it already have pipe,
+         * nothing to do
+         */
+        if (uep->pipe)
+                return 0;
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &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;
+        }
+
+        usbhsg_unlock(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;
+        unsigned long flags;
+        int ret;
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &flags);
+
+        ret = usbhsg_pipe_disable(uep);
+
+        usbhsg_unlock(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;
+        unsigned long flags;
+        int ret = 0;
+
+        /*
+         * 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 usbshg_trylock 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 ********************/
+        lock = usbhsg_trylock(gpriv, &flags);
+
+        /* param check */
+        if (usbhsg_is_not_connected(gpriv)      ||
+            unlikely(!gpriv->driver)            ||
+            unlikely(!pipe))
+                ret = -ESHUTDOWN;
+        else
+                usbhsg_queue_push(uep, ureq);
+
+        usbhsg_unlock(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;
+        unsigned long flags;
+
+        /*
+         * see
+         *   CAUTION [*queue handler*]
+         *   CAUTION [*endpoint queue*]
+         *   CAUTION [*request complete*]
+         */
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &flags);
+
+        usbhsg_queue_pop(uep, ureq, -ECONNRESET);
+
+        usbhsg_unlock(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;
+        unsigned long flags;
+        int ret = -EAGAIN;
+
+        /*
+         * see
+         *   CAUTION [*queue handler*]
+         *   CAUTION [*endpoint queue*]
+         *   CAUTION [*request complete*]
+         */
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &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;
+        }
+
+        usbhsg_unlock(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;
+        unsigned long flags;
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &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_uep_init(gpriv);
+        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:
+        usbhsg_unlock(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;
+        unsigned long flags;
+
+        /********************  spin lock ********************/
+        lock = usbhsg_trylock(gpriv, &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);
+
+        usbhsg_unlock(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:
+        usbhsg_unlock(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->uep);
+        kfree(gpriv);
+}