usb: gadget: renesas_usbhs: add mod_host support

This is mod_host prototype support for renesas_usbhs driver.
It doesn't support USB-Hub, and USB-DMAC for now.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 1336 insertions, 2 deletions

diff --git a/drivers/usb/renesas_usbhs/Makefile b/drivers/usb/renesas_usbhs/Makefile
index ce08345fa15a..e44984d233f7 100644
--- a/drivers/usb/renesas_usbhs/Makefile
+++ b/drivers/usb/renesas_usbhs/Makefile
@@ -6,4 +6,5 @@ obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs.o
 
 renesas_usbhs-y                 := common.o mod.o pipe.o fifo.o
 
+renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_HCD)   += mod_host.o
 renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_UDC)   += mod_gadget.o
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c
index 993c2ca4f0ca..2d3b09d0d846 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -140,10 +140,14 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
         /*
          * install host/gadget driver
          */
-        ret = usbhs_mod_gadget_probe(priv);
+        ret = usbhs_mod_host_probe(priv);
         if (ret < 0)
                 return ret;
 
+        ret = usbhs_mod_gadget_probe(priv);
+        if (ret < 0)
+                goto mod_init_host_err;
+
         /* irq settings */
         ret = request_irq(priv->irq, usbhs_interrupt,
                           0, dev_name(dev), priv);
@@ -156,12 +160,15 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
 
 mod_init_gadget_err:
         usbhs_mod_gadget_remove(priv);
+mod_init_host_err:
+        usbhs_mod_host_remove(priv);
 
         return ret;
 }
 
 void usbhs_mod_remove(struct usbhs_priv *priv)
 {
+        usbhs_mod_host_remove(priv);
         usbhs_mod_gadget_remove(priv);
         free_irq(priv->irq, priv);
 }
diff --git a/drivers/usb/renesas_usbhs/mod.h b/drivers/usb/renesas_usbhs/mod.h
index df4b61dab313..1f28ed2e9abe 100644
--- a/drivers/usb/renesas_usbhs/mod.h
+++ b/drivers/usb/renesas_usbhs/mod.h
@@ -139,8 +139,21 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
         })
 
 /*
- * gadget control
+ * host / gadget control
  */
+#ifdef CONFIG_USB_RENESAS_USBHS_HCD
+extern int __devinit usbhs_mod_host_probe(struct usbhs_priv *priv);
+extern int __devexit usbhs_mod_host_remove(struct usbhs_priv *priv);
+#else
+static inline int usbhs_mod_host_probe(struct usbhs_priv *priv)
+{
+        return 0;
+}
+static inline void usbhs_mod_host_remove(struct usbhs_priv *priv)
+{
+}
+#endif
+
 #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);
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
new file mode 100644
index 000000000000..1c603310f9f8
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -0,0 +1,1313 @@
+/*
+ * 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/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include "common.h"
+
+/*
+ *** HARDWARE LIMITATION ***
+ *
+ * 1) renesas_usbhs has a limited number of controllable devices.
+ *    it can control only 9 devices in generally.
+ *      see DEVADDn / DCPMAXP / PIPEMAXP.
+ *
+ * 2) renesas_usbhs pipe number is limited.
+ *    the pipe will be re-used for each devices.
+ *    so, software should control DATA0/1 sequence of each devices.
+ */
+
+
+/*
+ *              image of mod_host
+ *
+ * +--------+
+ * | udev 0 | --> it is used when set address
+ * +--------+
+ *
+ * +--------+                                   pipes are reused for each uep.
+ * | udev 1 |-+- [uep 0 (dcp) ] --+             pipe will be switched when
+ * +--------+ |                   |             target device was changed
+ *            +- [uep 1 (bulk)] --|---+            +--------------+
+ *            |                   +--------------> | pipe0 (dcp)  |
+ *            +- [uep 2 (bulk)] --|---|---+        +--------------+
+ *                                |   |   |        | pipe1 (isoc) |
+ * +--------+                     |   |   |        +--------------+
+ * | udev 2 |-+- [uep 0 (dcp) ] --+   +-- |------> | pipe2 (bulk) |
+ * +--------+ |                   |   |   |        +--------------+
+ *            +- [uep 1 (int) ] --|-+ |   +------> | pipe3 (bulk) |
+ *                                | | |   |        +--------------+
+ * +--------+                     | +-|---|------> | pipe4 (int)  |
+ * | udev 3 |-+- [uep 0 (dcp) ] --+   |   |        +--------------+
+ * +--------+ |                       |   |        | ....         |
+ *            +- [uep 1 (bulk)] ------+   |        | ....         |
+ *            |                           |
+ *            +- [uep 2 (bulk)]-----------+
+ */
+
+
+/*
+ *              struct
+ */
+struct usbhsh_pipe_info {
+        unsigned int            usr_cnt; /* see usbhsh_endpoint_alloc() */
+};
+
+struct usbhsh_request {
+        struct urb              *urb;
+        struct usbhs_pkt        pkt;
+        struct list_head        ureq_link; /* see hpriv :: ureq_link_xxx */
+};
+
+struct usbhsh_device {
+        struct usb_device       *usbv;
+        struct list_head        ep_list_head; /* list of usbhsh_ep */
+};
+
+struct usbhsh_ep {
+        struct usbhs_pipe       *pipe;
+        struct usbhsh_device    *udev;   /* attached udev */
+        struct list_head        ep_list; /* list to usbhsh_device */
+
+        int maxp;
+};
+
+#define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
+#define USBHSH_PORT_MAX          7 /* see DEVADDn :: HUBPORT */
+struct usbhsh_hpriv {
+        struct usbhs_mod        mod;
+        struct usbhs_pipe       *dcp;
+
+        struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
+
+        struct usbhsh_pipe_info *pipe_info;
+        int                      pipe_size;
+
+        u32     port_stat;      /* USB_PORT_STAT_xxx */
+
+        struct completion       *done;
+
+        /* see usbhsh_req_alloc/free */
+        struct list_head        ureq_link_active;
+        struct list_head        ureq_link_free;
+};
+
+
+static const char usbhsh_hcd_name[] = "renesas_usbhs host";
+
+/*
+ *              macro
+ */
+#define usbhsh_priv_to_hpriv(priv) \
+        container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
+
+#define __usbhsh_for_each_hpipe(start, pos, h, i)       \
+        for (i = start, pos = (h)->hpipe + i;           \
+             i < (h)->hpipe_size;                       \
+             i++, pos = (h)->hpipe + i)
+
+#define usbhsh_for_each_hpipe(pos, hpriv, i)    \
+        __usbhsh_for_each_hpipe(1, pos, hpriv, i)
+
+#define usbhsh_for_each_hpipe_with_dcp(pos, hpriv, i)   \
+        __usbhsh_for_each_hpipe(0, pos, hpriv, i)
+
+#define __usbhsh_for_each_udev(start, pos, h, i)        \
+        for (i = start, pos = (h)->udev + i;            \
+             i < USBHSH_DEVICE_MAX;                     \
+             i++, pos = (h)->udev + i)
+
+#define usbhsh_for_each_udev(pos, hpriv, i)     \
+        __usbhsh_for_each_udev(1, pos, hpriv, i)
+
+#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)   \
+        __usbhsh_for_each_udev(0, pos, hpriv, i)
+
+#define usbhsh_hcd_to_hpriv(h)  (struct usbhsh_hpriv *)((h)->hcd_priv)
+#define usbhsh_hcd_to_dev(h)    ((h)->self.controller)
+
+#define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
+#define usbhsh_hpriv_to_dcp(h)  ((h)->dcp)
+#define usbhsh_hpriv_to_hcd(h)  \
+        container_of((void *)h, struct usb_hcd, hcd_priv)
+
+#define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
+#define usbhsh_uep_to_pipe(u)   ((u)->pipe)
+#define usbhsh_uep_to_udev(u)   ((u)->udev)
+#define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
+#define usbhsh_urb_to_usbv(u)   ((u)->dev)
+
+#define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
+
+#define usbhsh_udev_to_usbv(h)  ((h)->usbv)
+
+#define usbhsh_pipe_info(p)     ((p)->mod_private)
+
+#define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
+#define usbhsh_device_nth(h, d)         ((h)->udev + d)
+#define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
+
+#define usbhsh_port_stat_init(h)        ((h)->port_stat = 0)
+#define usbhsh_port_stat_set(h, s)      ((h)->port_stat |= (s))
+#define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
+#define usbhsh_port_stat_get(h)         ((h)->port_stat)
+
+#define usbhsh_pkt_to_req(p)    \
+        container_of((void *)p, struct usbhsh_request, pkt)
+
+/*
+ *              req alloc/free
+ */
+static void usbhsh_req_list_init(struct usbhsh_hpriv *hpriv)
+{
+        INIT_LIST_HEAD(&hpriv->ureq_link_active);
+        INIT_LIST_HEAD(&hpriv->ureq_link_free);
+}
+
+static void usbhsh_req_list_quit(struct usbhsh_hpriv *hpriv)
+{
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usbhsh_request *ureq, *next;
+
+        /* kfree all active ureq */
+        list_for_each_entry_safe(ureq, next,
+                                 &hpriv->ureq_link_active,
+                                 ureq_link) {
+                dev_err(dev, "active ureq (%p) is force freed\n", ureq);
+                kfree(ureq);
+        }
+
+        /* kfree all free ureq */
+        list_for_each_entry_safe(ureq, next, &hpriv->ureq_link_free, ureq_link)
+                kfree(ureq);
+}
+
+static struct usbhsh_request *usbhsh_req_alloc(struct usbhsh_hpriv *hpriv,
+                                               struct urb *urb,
+                                               gfp_t mem_flags)
+{
+        struct usbhsh_request *ureq;
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        if (list_empty(&hpriv->ureq_link_free)) {
+                /*
+                 * create new one if there is no free ureq
+                 */
+                ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
+                if (ureq)
+                        INIT_LIST_HEAD(&ureq->ureq_link);
+        } else {
+                /*
+                 * reuse "free" ureq if exist
+                 */
+                ureq = list_entry(hpriv->ureq_link_free.next,
+                                  struct usbhsh_request,
+                                  ureq_link);
+                if (ureq)
+                        list_del_init(&ureq->ureq_link);
+        }
+
+        if (!ureq) {
+                dev_err(dev, "ureq alloc fail\n");
+                return NULL;
+        }
+
+        usbhs_pkt_init(&ureq->pkt);
+
+        /*
+         * push it to "active" list
+         */
+        list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_active);
+        ureq->urb = urb;
+
+        return ureq;
+}
+
+static void usbhsh_req_free(struct usbhsh_hpriv *hpriv,
+                            struct usbhsh_request *ureq)
+{
+        struct usbhs_pkt *pkt = &ureq->pkt;
+
+        usbhs_pkt_init(pkt);
+
+        /*
+         * removed from "active" list,
+         * and push it to "free" list
+         */
+        ureq->urb = NULL;
+        list_del_init(&ureq->ureq_link);
+        list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_free);
+}
+
+/*
+ *              device control
+ */
+
+static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
+{
+        return !list_empty(&udev->ep_list_head);
+}
+
+static struct usbhsh_device *usbhsh_device_alloc(struct usbhsh_hpriv *hpriv,
+                                                 struct urb *urb)
+{
+        struct usbhsh_device *udev = NULL;
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        int i;
+
+        /*
+         * device 0
+         */
+        if (0 == usb_pipedevice(urb->pipe)) {
+                udev = usbhsh_device0(hpriv);
+                goto usbhsh_device_find;
+        }
+
+        /*
+         * find unused device
+         */
+        usbhsh_for_each_udev(udev, hpriv, i) {
+                if (usbhsh_udev_to_usbv(udev))
+                        continue;
+                goto usbhsh_device_find;
+        }
+
+        dev_err(dev, "no free usbhsh_device\n");
+
+        return NULL;
+
+usbhsh_device_find:
+        if (usbhsh_device_has_endpoint(udev))
+                dev_warn(dev, "udev have old endpoint\n");
+
+        /* uep will be attached */
+        INIT_LIST_HEAD(&udev->ep_list_head);
+
+        /*
+         * usbhsh_usbv_to_udev()
+         * usbhsh_udev_to_usbv()
+         * will be enable
+         */
+        dev_set_drvdata(&usbv->dev, udev);
+        udev->usbv = usbv;
+
+        /* set device config */
+        usbhs_set_device_speed(priv,
+                               usbhsh_device_number(hpriv, udev),
+                               usbhsh_device_number(hpriv, udev),
+                               0, /* FIXME no parent */
+                               usbv->speed);
+
+        dev_dbg(dev, "%s [%d](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev), udev);
+
+        return udev;
+}
+
+static void usbhsh_device_free(struct usbhsh_hpriv *hpriv,
+                               struct usbhsh_device *udev)
+{
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+
+        dev_dbg(dev, "%s [%d](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev), udev);
+
+        if (usbhsh_device_has_endpoint(udev))
+                dev_warn(dev, "udev still have endpoint\n");
+
+        /*
+         * usbhsh_usbv_to_udev()
+         * usbhsh_udev_to_usbv()
+         * will be disable
+         */
+        dev_set_drvdata(&usbv->dev, NULL);
+        udev->usbv = NULL;
+}
+
+/*
+ *              end-point control
+ */
+struct usbhsh_ep *usbhsh_endpoint_alloc(struct usbhsh_hpriv *hpriv,
+                                        struct usbhsh_device *udev,
+                                        struct usb_host_endpoint *ep,
+                                        gfp_t mem_flags)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct usbhsh_ep *uep;
+        struct usbhsh_pipe_info *info;
+        struct usbhs_pipe *pipe, *best_pipe;
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usb_endpoint_descriptor *desc = &ep->desc;
+        int type, i;
+        unsigned int min_usr;
+
+        uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
+        if (!uep) {
+                dev_err(dev, "usbhsh_ep alloc fail\n");
+                return NULL;
+        }
+        type = usb_endpoint_type(desc);
+
+        /*
+         * find best pipe for endpoint
+         * see
+         *      HARDWARE LIMITATION
+         */
+        min_usr = ~0;
+        best_pipe = NULL;
+        usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+                if (!usbhs_pipe_type_is(pipe, type))
+                        continue;
+
+                info = usbhsh_pipe_info(pipe);
+
+                if (min_usr > info->usr_cnt) {
+                        min_usr         = info->usr_cnt;
+                        best_pipe       = pipe;
+                }
+        }
+
+        if (unlikely(!best_pipe)) {
+                dev_err(dev, "couldn't find best pipe\n");
+                kfree(uep);
+                return NULL;
+        }
+
+        /*
+         * init uep
+         */
+        uep->pipe       = best_pipe;
+        uep->maxp       = usb_endpoint_maxp(desc);
+        usbhsh_uep_to_udev(uep) = udev;
+        usbhsh_ep_to_uep(ep)    = uep;
+
+        /*
+         * update pipe user count
+         */
+        info = usbhsh_pipe_info(best_pipe);
+        info->usr_cnt++;
+
+        /* init this endpoint, and attach it to udev */
+        INIT_LIST_HEAD(&uep->ep_list);
+        list_add_tail(&uep->ep_list, &udev->ep_list_head);
+
+        /*
+         * usbhs_pipe_config_update() should be called after
+         * usbhs_device_config()
+         * see
+         *  DCPMAXP/PIPEMAXP
+         */
+        usbhs_pipe_config_update(uep->pipe,
+                                 usbhsh_device_number(hpriv, udev),
+                                 usb_endpoint_num(desc),
+                                 uep->maxp);
+
+        dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev),
+                usbhs_pipe_name(pipe), uep);
+
+        return uep;
+}
+
+void usbhsh_endpoint_free(struct usbhsh_hpriv *hpriv,
+                          struct usb_host_endpoint *ep)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
+        struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
+        struct usbhsh_pipe_info *info;
+
+        if (!uep)
+                return;
+
+        dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev),
+                usbhs_pipe_name(uep->pipe), uep);
+
+        info = usbhsh_pipe_info(uep->pipe);
+        info->usr_cnt--;
+
+        /* remove this endpoint from udev */
+        list_del_init(&uep->ep_list);
+
+        usbhsh_uep_to_udev(uep) = NULL;
+        usbhsh_ep_to_uep(ep) = NULL;
+
+        kfree(uep);
+}
+
+/*
+ *              queue push/pop
+ */
+static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
+{
+        struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct urb *urb = ureq->urb;
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        dev_dbg(dev, "%s\n", __func__);
+
+        if (!urb) {
+                dev_warn(dev, "pkt doesn't have urb\n");
+                return;
+        }
+
+        urb->actual_length = pkt->actual;
+        usbhsh_req_free(hpriv, ureq);
+        usbhsh_urb_to_ureq(urb) = NULL;
+
+        usb_hcd_unlink_urb_from_ep(hcd, urb);
+        usb_hcd_giveback_urb(hcd, urb, 0);
+}
+
+static int usbhsh_queue_push(struct usb_hcd *hcd,
+                             struct usbhs_pipe *pipe,
+                             struct urb *urb)
+{
+        struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
+        struct usbhs_pkt *pkt = &ureq->pkt;
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        void *buf;
+        int len;
+
+        if (usb_pipeisoc(urb->pipe)) {
+                dev_err(dev, "pipe iso is not supported now\n");
+                return -EIO;
+        }
+
+        if (usb_pipein(urb->pipe))
+                pipe->handler = &usbhs_fifo_pio_pop_handler;
+        else
+                pipe->handler = &usbhs_fifo_pio_push_handler;
+
+        buf = (void *)(urb->transfer_buffer + urb->actual_length);
+        len = urb->transfer_buffer_length - urb->actual_length;
+
+        dev_dbg(dev, "%s\n", __func__);
+        usbhs_pkt_push(pipe, pkt, usbhsh_queue_done,
+                       buf, len, (urb->transfer_flags & URB_ZERO_PACKET));
+        usbhs_pkt_start(pipe);
+
+        return 0;
+}
+
+/*
+ *              DCP setup stage
+ */
+static int usbhsh_is_request_address(struct urb *urb)
+{
+        struct usb_ctrlrequest *cmd;
+
+        cmd = (struct usb_ctrlrequest *)urb->setup_packet;
+
+        if ((DeviceOutRequest    == cmd->bRequestType << 8) &&
+            (USB_REQ_SET_ADDRESS == cmd->bRequest))
+                return 1;
+        else
+                return 0;
+}
+
+static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
+                                           struct urb *urb,
+                                           struct usbhs_pipe *pipe)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct usb_ctrlrequest req;
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        /*
+         * wait setup packet ACK
+         * see
+         *      usbhsh_irq_setup_ack()
+         *      usbhsh_irq_setup_err()
+         */
+        DECLARE_COMPLETION(done);
+        hpriv->done = &done;
+
+        /* copy original request */
+        memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
+
+        /*
+         * renesas_usbhs can not use original usb address.
+         * see HARDWARE LIMITATION.
+         * modify usb address here.
+         */
+        if (usbhsh_is_request_address(urb)) {
+                /* FIXME */
+                req.wValue = 1;
+                dev_dbg(dev, "create new address - %d\n", req.wValue);
+        }
+
+        /* set request */
+        usbhs_usbreq_set_val(priv, &req);
+
+        /*
+         * wait setup packet ACK
+         */
+        wait_for_completion(&done);
+        hpriv->done = NULL;
+
+        dev_dbg(dev, "%s done\n", __func__);
+}
+
+/*
+ *              DCP data stage
+ */
+static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
+                                          struct usbhs_pkt *pkt)
+{
+        struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct urb *urb = ureq->urb;
+
+        /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
+
+        usbhsh_req_free(hpriv, ureq);
+        usbhsh_urb_to_ureq(urb) = NULL;
+}
+
+static void usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
+                                          struct urb *urb,
+                                          struct usbhs_pipe *pipe)
+{
+        struct usbhsh_request *ureq;
+        struct usbhs_pkt *pkt;
+
+        /*
+         * FIXME
+         *
+         * data stage uses ureq which is connected to urb
+         * see usbhsh_urb_enqueue() :: alloc new request.
+         * it will be freed in usbhsh_data_stage_packet_done()
+         */
+        ureq    = usbhsh_urb_to_ureq(urb);
+        pkt     = &ureq->pkt;
+
+        if (usb_pipein(urb->pipe))
+                pipe->handler = &usbhs_dcp_data_stage_in_handler;
+        else
+                pipe->handler = &usbhs_dcp_data_stage_out_handler;
+
+        usbhs_pkt_push(pipe, pkt,
+                       usbhsh_data_stage_packet_done,
+                       urb->transfer_buffer,
+                       urb->transfer_buffer_length,
+                       (urb->transfer_flags & URB_ZERO_PACKET));
+}
+
+/*
+ *              DCP status stage
+ */
+static void usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
+                                            struct urb *urb,
+                                            struct usbhs_pipe *pipe)
+{
+        struct usbhsh_request *ureq;
+        struct usbhs_pkt *pkt;
+
+        /*
+         * FIXME
+         *
+         * status stage uses allocated ureq.
+         * it will be freed on usbhsh_queue_done()
+         */
+        ureq    = usbhsh_req_alloc(hpriv, urb, GFP_KERNEL);
+        pkt     = &ureq->pkt;
+
+        if (usb_pipein(urb->pipe))
+                pipe->handler = &usbhs_dcp_status_stage_in_handler;
+        else
+                pipe->handler = &usbhs_dcp_status_stage_out_handler;
+
+        usbhs_pkt_push(pipe, pkt,
+                       usbhsh_queue_done,
+                       NULL,
+                       urb->transfer_buffer_length,
+                       0);
+}
+
+static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
+                                 struct usbhsh_hpriv *hpriv,
+                                 struct usbhs_pipe *pipe,
+                                 struct urb *urb)
+{
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+
+        dev_dbg(dev, "%s\n", __func__);
+
+        /*
+         * setup stage
+         *
+         * usbhsh_send_setup_stage_packet() wait SACK/SIGN
+         */
+        usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
+
+        /*
+         * data stage
+         *
+         * It is pushed only when urb has buffer.
+         */
+        if (urb->transfer_buffer_length)
+                usbhsh_data_stage_packet_push(hpriv, urb, pipe);
+
+        /*
+         * status stage
+         */
+        usbhsh_status_stage_packet_push(hpriv, urb, pipe);
+
+        /*
+         * start pushed packets
+         */
+        usbhs_pkt_start(pipe);
+
+        return 0;
+}
+
+/*
+ *              dma map functions
+ */
+static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
+{
+        return 0;
+}
+
+/*
+ *              for hc_driver
+ */
+static int usbhsh_host_start(struct usb_hcd *hcd)
+{
+        return 0;
+}
+
+static void usbhsh_host_stop(struct usb_hcd *hcd)
+{
+}
+
+static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
+                              struct urb *urb,
+                              gfp_t mem_flags)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+        struct usb_host_endpoint *ep = urb->ep;
+        struct usbhsh_request *ureq;
+        struct usbhsh_device *udev, *new_udev = NULL;
+        struct usbhs_pipe *pipe;
+        struct usbhsh_ep *uep;
+
+        int ret;
+
+        dev_dbg(dev, "%s (%s)\n",
+                __func__, usb_pipein(urb->pipe) ? "in" : "out");
+
+        ret = usb_hcd_link_urb_to_ep(hcd, urb);
+        if (ret)
+                goto usbhsh_urb_enqueue_error_not_linked;
+
+        /*
+         * get udev
+         */
+        udev = usbhsh_usbv_to_udev(usbv);
+        if (!udev) {
+                new_udev = usbhsh_device_alloc(hpriv, urb);
+                if (!new_udev)
+                        goto usbhsh_urb_enqueue_error_not_linked;
+
+                udev = new_udev;
+        }
+
+        /*
+         * get uep
+         */
+        uep = usbhsh_ep_to_uep(ep);
+        if (!uep) {
+                uep = usbhsh_endpoint_alloc(hpriv, udev, ep, mem_flags);
+                if (!uep)
+                        goto usbhsh_urb_enqueue_error_free_device;
+        }
+        pipe = usbhsh_uep_to_pipe(uep);
+
+        /*
+         * alloc new request
+         */
+        ureq = usbhsh_req_alloc(hpriv, urb, mem_flags);
+        if (unlikely(!ureq)) {
+                ret = -ENOMEM;
+                goto usbhsh_urb_enqueue_error_free_endpoint;
+        }
+        usbhsh_urb_to_ureq(urb) = ureq;
+
+        /*
+         * push packet
+         */
+        if (usb_pipecontrol(urb->pipe))
+                usbhsh_dcp_queue_push(hcd, hpriv, pipe, urb);
+        else
+                usbhsh_queue_push(hcd, pipe, urb);
+
+        return 0;
+
+usbhsh_urb_enqueue_error_free_endpoint:
+        usbhsh_endpoint_free(hpriv, ep);
+usbhsh_urb_enqueue_error_free_device:
+        if (new_udev)
+                usbhsh_device_free(hpriv, new_udev);
+usbhsh_urb_enqueue_error_not_linked:
+
+        dev_dbg(dev, "%s error\n", __func__);
+
+        return ret;
+}
+
+static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
+
+        if (ureq) {
+                usbhsh_req_free(hpriv, ureq);
+                usbhsh_urb_to_ureq(urb) = NULL;
+        }
+
+        return 0;
+}
+
+static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
+                                    struct usb_host_endpoint *ep)
+{
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
+        struct usbhsh_device *udev;
+        struct usbhsh_hpriv *hpriv;
+
+        /*
+         * this function might be called manytimes by same hcd/ep
+         * in-endpoitn == out-endpoint if ep == dcp.
+         */
+        if (!uep)
+                return;
+
+        udev    = usbhsh_uep_to_udev(uep);
+        hpriv   = usbhsh_hcd_to_hpriv(hcd);
+
+        usbhsh_endpoint_free(hpriv, ep);
+        ep->hcpriv = NULL;
+
+        /*
+         * if there is no endpoint,
+         * free device
+         */
+        if (!usbhsh_device_has_endpoint(udev))
+                usbhsh_device_free(hpriv, udev);
+}
+
+static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int roothub_id = 1; /* only 1 root hub */
+
+        /*
+         * does port stat was changed ?
+         * check USB_PORT_STAT_C_xxx << 16
+         */
+        if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
+                *buf = (1 << roothub_id);
+        else
+                *buf = 0;
+
+        dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
+
+        return !!(*buf);
+}
+
+static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
+                                    u16 typeReq, u16 wValue,
+                                    u16 wIndex, char *buf, u16 wLength)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        switch (wValue) {
+        case C_HUB_OVER_CURRENT:
+        case C_HUB_LOCAL_POWER:
+                dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
+                return 0;
+        }
+
+        return -EPIPE;
+}
+
+static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
+                                     u16 typeReq, u16 wValue,
+                                     u16 wIndex, char *buf, u16 wLength)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int enable = (typeReq == SetPortFeature);
+        int speed, i, timeout = 128;
+        int roothub_id = 1; /* only 1 root hub */
+
+        /* common error */
+        if (wIndex > roothub_id || wLength != 0)
+                return -EPIPE;
+
+        /* check wValue */
+        switch (wValue) {
+        case USB_PORT_FEAT_POWER:
+                usbhs_vbus_ctrl(priv, enable);
+                dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
+                break;
+
+        case USB_PORT_FEAT_ENABLE:
+        case USB_PORT_FEAT_SUSPEND:
+        case USB_PORT_FEAT_C_ENABLE:
+        case USB_PORT_FEAT_C_SUSPEND:
+        case USB_PORT_FEAT_C_CONNECTION:
+        case USB_PORT_FEAT_C_OVER_CURRENT:
+        case USB_PORT_FEAT_C_RESET:
+                dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
+                break;
+
+        case USB_PORT_FEAT_RESET:
+                if (!enable)
+                        break;
+
+                usbhsh_port_stat_clear(hpriv,
+                                       USB_PORT_STAT_HIGH_SPEED |
+                                       USB_PORT_STAT_LOW_SPEED);
+
+                usbhs_bus_send_reset(priv);
+                msleep(20);
+                usbhs_bus_send_sof_enable(priv);
+
+                for (i = 0; i < timeout ; i++) {
+                        switch (usbhs_bus_get_speed(priv)) {
+                        case USB_SPEED_LOW:
+                                speed = USB_PORT_STAT_LOW_SPEED;
+                                goto got_usb_bus_speed;
+                        case USB_SPEED_HIGH:
+                                speed = USB_PORT_STAT_HIGH_SPEED;
+                                goto got_usb_bus_speed;
+                        case USB_SPEED_FULL:
+                                speed = 0;
+                                goto got_usb_bus_speed;
+                        }
+
+                        msleep(20);
+                }
+                return -EPIPE;
+
+got_usb_bus_speed:
+                usbhsh_port_stat_set(hpriv, speed);
+                usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
+
+                dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
+                        __func__, speed);
+
+                /* status change is not needed */
+                return 0;
+
+        default:
+                return -EPIPE;
+        }
+
+        /* set/clear status */
+        if (enable)
+                usbhsh_port_stat_set(hpriv, (1 << wValue));
+        else
+                usbhsh_port_stat_clear(hpriv, (1 << wValue));
+
+        return 0;
+}
+
+static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
+                                   u16 typeReq, u16 wValue,
+                                   u16 wIndex, char *buf, u16 wLength)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int roothub_id = 1; /* only 1 root hub */
+
+        switch (typeReq) {
+        case GetHubStatus:
+                dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
+
+                *buf = 0x00;
+                break;
+
+        case GetPortStatus:
+                if (wIndex != roothub_id)
+                        return -EPIPE;
+
+                dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
+                *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
+                break;
+
+        case GetHubDescriptor:
+                desc->bDescriptorType           = 0x29;
+                desc->bHubContrCurrent          = 0;
+                desc->bNbrPorts                 = roothub_id;
+                desc->bDescLength               = 9;
+                desc->bPwrOn2PwrGood            = 0;
+                desc->wHubCharacteristics       = cpu_to_le16(0x0011);
+                desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
+                desc->u.hs.DeviceRemovable[1]   = ~0;
+                dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
+                break;
+        }
+
+        return 0;
+}
+
+static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+                              u16 wIndex, char *buf, u16 wLength)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int ret = -EPIPE;
+
+        switch (typeReq) {
+
+        /* Hub Feature */
+        case ClearHubFeature:
+        case SetHubFeature:
+                ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
+                                               wValue, wIndex, buf, wLength);
+                break;
+
+        /* Port Feature */
+        case SetPortFeature:
+        case ClearPortFeature:
+                ret = __usbhsh_hub_port_feature(hpriv, typeReq,
+                                                wValue, wIndex, buf, wLength);
+                break;
+
+        /* Get status */
+        case GetHubStatus:
+        case GetPortStatus:
+        case GetHubDescriptor:
+                ret = __usbhsh_hub_get_status(hpriv, typeReq,
+                                              wValue, wIndex, buf, wLength);
+                break;
+        }
+
+        dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
+                typeReq, ret, usbhsh_port_stat_get(hpriv));
+
+        return ret;
+}
+
+static struct hc_driver usbhsh_driver = {
+        .description =          usbhsh_hcd_name,
+        .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
+
+        /*
+         * generic hardware linkage
+         */
+        .flags =                HCD_USB2,
+
+        .start =                usbhsh_host_start,
+        .stop =                 usbhsh_host_stop,
+
+        /*
+         * managing i/o requests and associated device resources
+         */
+        .urb_enqueue =          usbhsh_urb_enqueue,
+        .urb_dequeue =          usbhsh_urb_dequeue,
+        .endpoint_disable =     usbhsh_endpoint_disable,
+
+        /*
+         * root hub
+         */
+        .hub_status_data =      usbhsh_hub_status_data,
+        .hub_control =          usbhsh_hub_control,
+};
+
+/*
+ *              interrupt functions
+ */
+static int usbhsh_irq_attch(struct usbhs_priv *priv,
+                            struct usbhs_irq_state *irq_state)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        dev_dbg(dev, "device attached\n");
+
+        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
+        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
+
+        return 0;
+}
+
+static int usbhsh_irq_dtch(struct usbhs_priv *priv,
+                           struct usbhs_irq_state *irq_state)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        dev_dbg(dev, "device detached\n");
+
+        usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
+        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
+
+        return 0;
+}
+
+static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
+                                struct usbhs_irq_state *irq_state)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        dev_dbg(dev, "setup packet OK\n");
+
+        if (unlikely(!hpriv->done))
+                dev_err(dev, "setup ack happen without necessary data\n");
+        else
+                complete(hpriv->done); /* see usbhsh_urb_enqueue() */
+
+        return 0;
+}
+
+static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
+                                struct usbhs_irq_state *irq_state)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        dev_dbg(dev, "setup packet Err\n");
+
+        if (unlikely(!hpriv->done))
+                dev_err(dev, "setup err happen without necessary data\n");
+        else
+                complete(hpriv->done); /* see usbhsh_urb_enqueue() */
+
+        return 0;
+}
+
+/*
+ *              module start/stop
+ */
+static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct usbhsh_pipe_info *pipe_info = hpriv->pipe_info;
+        struct usbhs_pipe *pipe;
+        u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
+        int pipe_size = usbhs_get_dparam(priv, pipe_size);
+        int old_type, dir_in, i;
+
+        /* init all pipe */
+        old_type = USB_ENDPOINT_XFER_CONTROL;
+        for (i = 0; i < pipe_size; i++) {
+                pipe_info[i].usr_cnt    = 0;
+
+                /*
+                 * data "output" will be finished as soon as possible,
+                 * but there is no guaranty at data "input" case.
+                 *
+                 * "input" needs "standby" pipe.
+                 * So, "input" direction pipe > "output" direction pipe
+                 * is good idea.
+                 *
+                 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
+                 * and the other will be input direction here.
+                 *
+                 * ex)
+                 * ...
+                 * USB_ENDPOINT_XFER_ISOC -> dir out
+                 * USB_ENDPOINT_XFER_ISOC -> dir in
+                 * USB_ENDPOINT_XFER_BULK -> dir out
+                 * USB_ENDPOINT_XFER_BULK -> dir in
+                 * USB_ENDPOINT_XFER_BULK -> dir in
+                 * ...
+                 */
+                dir_in = (pipe_type[i] == old_type);
+                old_type = pipe_type[i];
+
+                if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
+                        pipe = usbhs_dcp_malloc(priv);
+                        usbhsh_hpriv_to_dcp(hpriv) = pipe;
+                } else {
+                        pipe = usbhs_pipe_malloc(priv,
+                                                 pipe_type[i],
+                                                 dir_in);
+                }
+
+                pipe->mod_private = pipe_info + i;
+        }
+}
+
+static int usbhsh_start(struct usbhs_priv *priv)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int ret;
+
+        /* add hcd */
+        ret = usb_add_hcd(hcd, 0, 0);
+        if (ret < 0)
+                return 0;
+
+        /*
+         * pipe initialize and enable DCP
+         */
+        usbhs_pipe_init(priv,
+                        usbhsh_dma_map_ctrl);
+        usbhs_fifo_init(priv);
+        usbhsh_pipe_init_for_host(priv);
+
+        /*
+         * system config enble
+         * - HI speed
+         * - host
+         * - usb module
+         */
+        usbhs_sys_hispeed_ctrl(priv, 1);
+        usbhs_sys_host_ctrl(priv, 1);
+        usbhs_sys_usb_ctrl(priv, 1);
+
+        /*
+         * enable irq callback
+         */
+        mod->irq_attch          = usbhsh_irq_attch;
+        mod->irq_dtch           = usbhsh_irq_dtch;
+        mod->irq_sack           = usbhsh_irq_setup_ack;
+        mod->irq_sign           = usbhsh_irq_setup_err;
+        usbhs_irq_callback_update(priv, mod);
+
+        dev_dbg(dev, "start host\n");
+
+        return ret;
+}
+
+static int usbhsh_stop(struct usbhs_priv *priv)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+
+        usb_remove_hcd(hcd);
+
+        /* disable sys */
+        usbhs_sys_hispeed_ctrl(priv, 0);
+        usbhs_sys_host_ctrl(priv, 0);
+        usbhs_sys_usb_ctrl(priv, 0);
+
+        dev_dbg(dev, "quit host\n");
+
+        return 0;
+}
+
+int __devinit usbhs_mod_host_probe(struct usbhs_priv *priv)
+{
+        struct usbhsh_hpriv *hpriv;
+        struct usb_hcd *hcd;
+        struct usbhsh_pipe_info *pipe_info;
+        struct usbhsh_device *udev;
+        struct device *dev = usbhs_priv_to_dev(priv);
+        int pipe_size = usbhs_get_dparam(priv, pipe_size);
+        int i;
+
+        /* initialize hcd */
+        hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
+        if (!hcd) {
+                dev_err(dev, "Failed to create hcd\n");
+                return -ENOMEM;
+        }
+
+        pipe_info = kzalloc(sizeof(*pipe_info) * pipe_size, GFP_KERNEL);
+        if (!pipe_info) {
+                dev_err(dev, "Could not allocate pipe_info\n");
+                goto usbhs_mod_host_probe_err;
+        }
+
+        /*
+         * 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 "usbhsh_start"
+         */
+
+        hpriv = usbhsh_hcd_to_hpriv(hcd);
+
+        /*
+         * register itself
+         */
+        usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
+
+        /* init hpriv */
+        hpriv->mod.name         = "host";
+        hpriv->mod.start        = usbhsh_start;
+        hpriv->mod.stop         = usbhsh_stop;
+        hpriv->pipe_info        = pipe_info;
+        hpriv->pipe_size        = pipe_size;
+        hpriv->done             = NULL;
+        usbhsh_req_list_init(hpriv);
+        usbhsh_port_stat_init(hpriv);
+
+        /* init all device */
+        usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
+                udev->usbv      = NULL;
+                INIT_LIST_HEAD(&udev->ep_list_head);
+        }
+
+        dev_info(dev, "host probed\n");
+
+        return 0;
+
+usbhs_mod_host_probe_err:
+        usb_put_hcd(hcd);
+
+        return -ENOMEM;
+}
+
+int __devexit usbhs_mod_host_remove(struct usbhs_priv *priv)
+{
+        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+
+        usbhsh_req_list_quit(hpriv);
+
+        usb_put_hcd(hcd);
+
+        return 0;
+}