usb: gadget: renesas_usbhs: add mod_host support
Kuninori Morimoto [Tue, 11 Oct 2011 05:07:40 +0000 (22:07 -0700)]
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>

drivers/usb/host/Kconfig
drivers/usb/renesas_usbhs/Makefile
drivers/usb/renesas_usbhs/mod.c
drivers/usb/renesas_usbhs/mod.h
drivers/usb/renesas_usbhs/mod_host.c [new file with mode: 0644]

index 3e5b235..060e0e2 100644 (file)
@@ -515,6 +515,19 @@ config USB_R8A66597_HCD
          To compile this driver as a module, choose M here: the
          module will be called r8a66597-hcd.
 
+config USB_RENESAS_USBHS_HCD
+       tristate "Renesas USBHS HCD support"
+       depends on USB
+       depends on USB_RENESAS_USBHS
+       help
+         The Renesas USBHS is a USB 2.0 host and peripheral controller.
+
+         Enable this option if your board has this chip, and you want
+         to use it as a host controller.  If unsure, say N.
+
+         To compile this driver as a module, choose M here: the
+         module will be called renesas-usbhs.
+
 config USB_WHCI_HCD
        tristate "Wireless USB Host Controller Interface (WHCI) driver (EXPERIMENTAL)"
        depends on EXPERIMENTAL
index ce08345..e44984d 100644 (file)
@@ -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
index 993c2ca..2d3b09d 100644 (file)
@@ -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);
 }
index df4b61d..1f28ed2 100644 (file)
@@ -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 (file)
index 0000000..1c60331
--- /dev/null
@@ -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;
+}