Ejemplo n.º 1
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 usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
	struct device *dev = usbhsg_gpriv_to_dev(gpriv);
	unsigned long flags;

	usbhsg_pipe_disable(uep);

	dev_dbg(dev, "set halt %d (pipe %d)\n",
		halt, usbhs_pipe_number(pipe));

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	if (halt)
		usbhs_pipe_stall(pipe);
	else
		usbhs_pipe_disable(pipe);

	if (halt && wedge)
		usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
	else
		usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	return 0;
}
Ejemplo n.º 2
0
/*
 *		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);
	unsigned long flags;
	int ret = 0;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	usbhsg_status_set(gpriv, status);
	if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
	      usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
		ret = -1; /* not ready */

	usbhs_unlock(priv, flags);
	/********************  spin unlock ********************/

	if (ret < 0)
		return 0; /* not ready is not error */

	/*
	 * enable interrupt and systems if ready
	 */
	dev_dbg(dev, "start gadget\n");

	/*
	 * pipe initialize and enable DCP
	 */
	usbhs_pipe_init(priv,
			usbhsg_queue_done,
			usbhsg_dma_map_ctrl);
	usbhs_fifo_init(priv);
	usbhsg_uep_init(gpriv);

	/* dcp init */
	dcp->pipe		= usbhs_dcp_malloc(priv);
	dcp->pipe->mod_private	= 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;
	usbhs_irq_callback_update(priv, mod);

	return 0;
}
Ejemplo n.º 3
0
static void usbhsh_endpoint_detach(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);
	unsigned long flags;

	if (!uep)
		return;

	dev_dbg(dev, "%s [%d-%d]\n", __func__,
		usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
		usb_endpoint_num(&ep->desc));

	if (usbhsh_uep_to_pipe(uep))
		usbhsh_pipe_detach(hpriv, uep);

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	/* remove this endpoint from udev */
	list_del_init(&uep->ep_list);

	usbhsh_uep_to_udev(uep)	= NULL;
	usbhsh_uep_to_ep(uep)	= NULL;
	usbhsh_ep_to_uep(ep)	= NULL;

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	kfree(uep);
}
Ejemplo n.º 4
0
static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
			       struct usbhsh_ep *uep)
{
	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
	struct usbhs_pipe *pipe;
	struct device *dev = usbhs_priv_to_dev(priv);
	unsigned long flags;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	pipe = usbhsh_uep_to_pipe(uep);

	if (unlikely(!pipe)) {
		dev_err(dev, "uep doens't have pipe\n");
	} else {
		struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
		struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);

		/* detach pipe from uep */
		usbhsh_uep_to_pipe(uep)		= NULL;
		usbhsh_pipe_to_uep(pipe)	= NULL;

		dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
			usbhsh_device_number(hpriv, udev),
			usb_endpoint_num(&ep->desc),
			usbhs_pipe_name(pipe));
	}

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/
}
Ejemplo n.º 5
0
/*
 *		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;
	struct usbhs_pipe *pipe;
	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);
	pipe = usbhsg_uep_to_pipe(uep);
	if (!pipe) {
		dev_err(dev, "wrong recip request\n");
		ret = -EINVAL;
		goto usbhsg_recip_run_handle_end;
	}

	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) {
		unsigned long flags;

		dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);

		/********************  spin lock ********************/
		usbhs_lock(priv, flags);
		ret = func(priv, uep, ctrl);
		usbhs_unlock(priv, flags);
		/********************  spin unlock ******************/
	}

usbhsg_recip_run_handle_end:
	usbhs_pkt_start(pipe);

	return ret;
}
Ejemplo n.º 6
0
/*
 *
 *		usb_ep_ops
 *
 */
static int usbhsg_ep_enable(struct usb_ep *ep,
			 const struct usb_endpoint_descriptor *desc)
{
	struct usbhsg_uep *uep   = usbhsg_ep_to_uep(ep);
	struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
	struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
	struct usbhs_pipe *pipe;
	int ret = -EIO;
	unsigned long flags;

	usbhs_lock(priv, flags);

	/*
	 * if it already have pipe,
	 * nothing to do
	 */
	if (uep->pipe) {
		usbhs_pipe_clear(uep->pipe);
		usbhs_pipe_sequence_data0(uep->pipe);
		ret = 0;
		goto usbhsg_ep_enable_end;
	}

	pipe = usbhs_pipe_malloc(priv,
				 usb_endpoint_type(desc),
				 usb_endpoint_dir_in(desc));
	if (pipe) {
		uep->pipe		= pipe;
		pipe->mod_private	= uep;

		/* set epnum / maxp */
		usbhs_pipe_config_update(pipe, 0,
					 usb_endpoint_num(desc),
					 usb_endpoint_maxp(desc));

		/*
		 * usbhs_fifo_dma_push/pop_handler try to
		 * use dmaengine if possible.
		 * It will use pio handler if impossible.
		 */
		if (usb_endpoint_dir_in(desc)) {
			pipe->handler = &usbhs_fifo_dma_push_handler;
		} else {
			pipe->handler = &usbhs_fifo_dma_pop_handler;
			usbhs_xxxsts_clear(priv, BRDYSTS,
					   usbhs_pipe_number(pipe));
		}

		ret = 0;
	}

usbhsg_ep_enable_end:
	usbhs_unlock(priv, flags);

	return ret;
}
Ejemplo n.º 7
0
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_priv *priv = usbhsg_gpriv_to_priv(gpriv);
	unsigned long flags;

	usbhs_lock(priv, flags);
	__usbhsg_queue_pop(uep, ureq, status);
	usbhs_unlock(priv, flags);
}
Ejemplo n.º 8
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);
	unsigned long flags;
	int ret = 0;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	usbhsg_status_clr(gpriv, status);
	if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
	    !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
		ret = -1; /* already done */

	usbhs_unlock(priv, flags);
	/********************  spin unlock ********************/

	if (ret < 0)
		return 0; /* already done is not error */

	/*
	 * disable interrupt and systems if 1st try
	 */
	usbhs_fifo_quit(priv);

	/* disable all irq */
	mod->irq_dev_state	= NULL;
	mod->irq_ctrl_stage	= NULL;
	usbhs_irq_callback_update(priv, mod);

	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_pipe_disable(dcp);

	if (gpriv->driver &&
	    gpriv->driver->disconnect)
		gpriv->driver->disconnect(&gpriv->gadget);

	dev_dbg(dev, "stop gadget\n");

	return 0;
}
Ejemplo n.º 9
0
static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
{
	struct usbhs_pipe *pipe = pkt->pipe;
	struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
	struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
	unsigned long flags;

	ureq->req.actual = pkt->actual;

	usbhs_lock(priv, flags);
	if (uep)
		__usbhsg_queue_pop(uep, ureq, 0);
	usbhs_unlock(priv, flags);
}
Ejemplo n.º 10
0
static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	struct usbhs_pkt *pkt;
	struct device *dev = usbhs_priv_to_dev(priv);
	int (*func)(struct usbhs_pkt *pkt, int *is_done);
	unsigned long flags;
	int ret = 0;
	int is_done = 0;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	pkt = __usbhsf_pkt_get(pipe);
	if (!pkt)
		goto __usbhs_pkt_handler_end;

	switch (type) {
	case USBHSF_PKT_PREPARE:
		func = pkt->handler->prepare;
		break;
	case USBHSF_PKT_TRY_RUN:
		func = pkt->handler->try_run;
		break;
	case USBHSF_PKT_DMA_DONE:
		func = pkt->handler->dma_done;
		break;
	default:
		dev_err(dev, "unknown pkt hander\n");
		goto __usbhs_pkt_handler_end;
	}

	ret = func(pkt, &is_done);

	if (is_done)
		__usbhsf_pkt_del(pkt);

__usbhs_pkt_handler_end:
	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	if (is_done) {
		pkt->done(priv, pkt);
		usbhs_pkt_start(pipe);
	}

	return ret;
}
Ejemplo n.º 11
0
static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
{
	struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
	struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
	unsigned long flags;

	usbhs_lock(priv, flags);
	if (is_on)
		usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
	else
		usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
	usbhsg_update_pullup(priv);
	usbhs_unlock(priv, flags);

	return 0;
}
Ejemplo n.º 12
0
static int usbhs_status_get_each_irq(struct usbhs_priv *priv,
				     struct usbhs_irq_state *state)
{
	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
	u16 intenb0, intenb1;
	unsigned long flags;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);
	state->intsts0 = usbhs_read(priv, INTSTS0);
	intenb0 = usbhs_read(priv, INTENB0);

	if (usbhs_mod_is_host(priv)) {
		state->intsts1 = usbhs_read(priv, INTSTS1);
		intenb1 = usbhs_read(priv, INTENB1);
	} else {
		state->intsts1 = intenb1 = 0;
	}

	/* mask */
	if (mod) {
		state->brdysts = usbhs_read(priv, BRDYSTS);
		state->nrdysts = usbhs_read(priv, NRDYSTS);
		state->bempsts = usbhs_read(priv, BEMPSTS);

		state->bempsts &= mod->irq_bempsts;
		state->brdysts &= mod->irq_brdysts;
	}
	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	/*
	 * Check whether the irq enable registers and the irq status are set
	 * when IRQF_SHARED is set.
	 */
	if (priv->irqflags & IRQF_SHARED) {
		if (!(intenb0 & state->intsts0) &&
		    !(intenb1 & state->intsts1) &&
		    !(state->bempsts) &&
		    !(state->brdysts))
			return -EIO;
	}

	return 0;
}
Ejemplo n.º 13
0
struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	unsigned long flags;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	if (!pkt)
		pkt = __usbhsf_pkt_get(pipe);

	if (pkt)
		__usbhsf_pkt_del(pkt);

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	return pkt;
}
Ejemplo n.º 14
0
void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
		    void (*done)(struct usbhs_priv *priv,
				 struct usbhs_pkt *pkt),
		    void *buf, int len, int zero, int sequence)
{
	struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
	struct device *dev = usbhs_priv_to_dev(priv);
	unsigned long flags;

	if (!done) {
		dev_err(dev, "no done function\n");
		return;
	}

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	if (!pipe->handler) {
		dev_err(dev, "no handler function\n");
		pipe->handler = &usbhsf_null_handler;
	}

	list_move_tail(&pkt->node, &pipe->list);

	/*
	 * each pkt must hold own handler.
	 * because handler might be changed by its situation.
	 * dma handler -> pio handler.
	 */
	pkt->pipe	= pipe;
	pkt->buf	= buf;
	pkt->handler	= pipe->handler;
	pkt->length	= len;
	pkt->zero	= zero;
	pkt->actual	= 0;
	pkt->done	= done;
	pkt->sequence	= sequence;

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/
}
Ejemplo n.º 15
0
/*
 *		endpoint control
 */
static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
				  struct urb *urb,
				  gfp_t mem_flags)
{
	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
	struct usb_host_endpoint *ep = urb->ep;
	struct usbhsh_ep *uep;
	struct device *dev = usbhs_priv_to_dev(priv);
	struct usb_endpoint_descriptor *desc = &ep->desc;
	unsigned long flags;

	uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
	if (!uep) {
		dev_err(dev, "usbhsh_ep alloc fail\n");
		return -ENOMEM;
	}

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	/*
	 * init endpoint
	 */
	uep->counter = 0;
	INIT_LIST_HEAD(&uep->ep_list);
	list_add_tail(&uep->ep_list, &udev->ep_list_head);

	usbhsh_uep_to_udev(uep)	= udev;
	usbhsh_uep_to_ep(uep)	= ep;
	usbhsh_ep_to_uep(ep)	= uep;

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	dev_dbg(dev, "%s [%d-%d]\n", __func__,
		usbhsh_device_number(hpriv, udev),
		usb_endpoint_num(desc));

	return 0;
}
Ejemplo n.º 16
0
static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
			       struct usbhsh_device *udev)
{
	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
	struct device *dev = usbhsh_hcd_to_dev(hcd);
	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
	unsigned long flags;

	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_endpoint_detach_all(hpriv, udev);
	}

	/*
	 * There is nothing to do if it is device0.
	 * see
	 *  usbhsh_device_attach()
	 *  usbhsh_device_get()
	 */
	if (0 == usbhsh_device_number(hpriv, udev))
		return;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	/*
	 * usbhsh_usbv_to_udev()
	 * usbhsh_udev_to_usbv()
	 * will be disable
	 */
	dev_set_drvdata(&usbv->dev, NULL);
	udev->usbv = NULL;

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/
}
Ejemplo n.º 17
0
static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
			      struct urb *urb)
{
	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
	struct usbhs_pipe *pipe;
	struct usb_endpoint_descriptor *desc = &urb->ep->desc;
	struct device *dev = usbhs_priv_to_dev(priv);
	unsigned long flags;
	int dir_in_req = !!usb_pipein(urb->pipe);
	int is_dcp = usb_endpoint_xfer_control(desc);
	int i, dir_in;
	int ret = -EBUSY;

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	/*
	 * if uep has been attached to pipe,
	 * reuse it
	 */
	if (usbhsh_uep_to_pipe(uep)) {
		ret = 0;
		goto usbhsh_pipe_attach_done;
	}

	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {

		/* check pipe type */
		if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
			continue;

		/* check pipe direction if normal pipe */
		if (!is_dcp) {
			dir_in = !!usbhs_pipe_is_dir_in(pipe);
			if (0 != (dir_in - dir_in_req))
				continue;
		}

		/* check pipe is free */
		if (usbhsh_pipe_to_uep(pipe))
			continue;

		/*
		 * attach pipe to uep
		 *
		 * usbhs_pipe_config_update() should be called after
		 * usbhs_set_device_config()
		 * see
		 *  DCPMAXP/PIPEMAXP
		 */
		usbhsh_uep_to_pipe(uep)		= pipe;
		usbhsh_pipe_to_uep(pipe)	= uep;

		usbhs_pipe_config_update(pipe,
					 usbhsh_device_number(hpriv, udev),
					 usb_endpoint_num(desc),
					 usb_endpoint_maxp(desc));

		dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
			usbhsh_device_number(hpriv, udev),
			usb_endpoint_num(desc),
			usbhs_pipe_name(pipe),
			dir_in_req ? "in" : "out");

		ret = 0;
		break;
	}

usbhsh_pipe_attach_done:
	if (0 == ret)
		uep->counter++;

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	return ret;
}
Ejemplo n.º 18
0
static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
						 struct urb *urb)
{
	struct usbhsh_device *udev = NULL;
	struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
	struct usbhsh_device *pos;
	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);
	unsigned long flags;
	u16 upphub, hubport;
	int i;

	/*
	 * This function should be called only while urb is pointing to device0.
	 * It will attach unused usbhsh_device to urb (usbv),
	 * and initialize device0.
	 * You can use usbhsh_device_get() to get "current" udev,
	 * and usbhsh_usbv_to_udev() is for "attached" udev.
	 */
	if (0 != usb_pipedevice(urb->pipe)) {
		dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
		return NULL;
	}

	/********************  spin lock ********************/
	usbhs_lock(priv, flags);

	/*
	 * find unused device
	 */
	usbhsh_for_each_udev(pos, hpriv, i) {
		if (usbhsh_udev_is_used(pos))
			continue;
		udev = pos;
		break;
	}

	if (udev) {
		/*
		 * usbhsh_usbv_to_udev()
		 * usbhsh_udev_to_usbv()
		 * will be enable
		 */
		dev_set_drvdata(&usbv->dev, udev);
		udev->usbv = usbv;
	}

	usbhs_unlock(priv, flags);
	/********************  spin unlock ******************/

	if (!udev) {
		dev_err(dev, "no free usbhsh_device\n");
		return NULL;
	}

	if (usbhsh_device_has_endpoint(udev)) {
		dev_warn(dev, "udev have old endpoint\n");
		usbhsh_endpoint_detach_all(hpriv, udev);
	}

	if (usbhsh_device_has_endpoint(udev0)) {
		dev_warn(dev, "udev0 have old endpoint\n");
		usbhsh_endpoint_detach_all(hpriv, udev0);
	}

	/* uep will be attached */
	INIT_LIST_HEAD(&udev0->ep_list_head);
	INIT_LIST_HEAD(&udev->ep_list_head);

	/*
	 * set device0 config
	 */
	usbhs_set_device_config(priv,
				0, 0, 0, usbv->speed);

	/*
	 * set new device config
	 */
	upphub	= 0;
	hubport	= 0;
	if (!usbhsh_connected_to_rhdev(hcd, udev)) {
		/* if udev is not connected to rhdev, it means parent is Hub */
		struct usbhsh_device *parent = usbhsh_device_parent(udev);

		upphub	= usbhsh_device_number(hpriv, parent);
		hubport	= usbhsh_device_hubport(udev);

		dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
			upphub, hubport, parent);
	}

	usbhs_set_device_config(priv,
			       usbhsh_device_number(hpriv, udev),
			       upphub, hubport, usbv->speed);

	dev_dbg(dev, "%s [%d](%p)\n", __func__,
		usbhsh_device_number(hpriv, udev), udev);

	return udev;
}