Ejemplos de otg_start_gadget en C++ (Cpp)

Ejemplo n.º 1

Archivo: usb-otg-fsm.c Proyecto: GAXUSXX/G935FGaXusKernel2

/* Change USB protocol when there is a protocol change */
static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
{
	int ret = 0;

	if (fsm->protocol != protocol) {
		VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
			fsm->protocol, protocol);
		/* stop old protocol */
		if (fsm->protocol == PROTO_HOST)
			ret = otg_start_host(fsm, 0);
		else if (fsm->protocol == PROTO_GADGET)
			ret = otg_start_gadget(fsm, 0);
		if (ret)
			return ret;

		/* start new protocol */
		if (protocol == PROTO_HOST)
			ret = otg_start_host(fsm, 1);
		else if (protocol == PROTO_GADGET)
			ret = otg_start_gadget(fsm, 1);
		if (ret)
			return ret;

		fsm->protocol = protocol;
		return 0;
	}

	return 0;
}

Ejemplo n.º 2

Archivo: otg.c Proyecto: 4pao/android_kernel_hardkernel_odroidxu3

static int dwc3_otg_statemachine(struct otg_fsm *fsm)
{
	struct usb_phy *phy	= fsm->otg->phy;
	enum usb_otg_state prev_state = phy->state;
	int			ret = 0;

	if (fsm->reset) {
		if (phy->state == OTG_STATE_A_HOST) {
			otg_drv_vbus(fsm, 0);
			otg_start_host(fsm, 0);
		} else if (phy->state == OTG_STATE_B_PERIPHERAL) {
			otg_start_gadget(fsm, 0);
		}

		phy->state = OTG_STATE_UNDEFINED;
		goto exit;
	}

	switch (phy->state) {
	case OTG_STATE_UNDEFINED:
		if (fsm->id)
			phy->state = OTG_STATE_B_IDLE;
		else
			phy->state = OTG_STATE_A_IDLE;
		break;
	case OTG_STATE_B_IDLE:
		if (!fsm->id) {
			phy->state = OTG_STATE_A_IDLE;
		} else if (fsm->b_sess_vld) {
			ret = otg_start_gadget(fsm, 1);
			if (!ret)
				phy->state = OTG_STATE_B_PERIPHERAL;
			else
				pr_err("OTG SM: cannot start gadget\n");
		}
		break;
	case OTG_STATE_B_PERIPHERAL:
		if (!fsm->id || !fsm->b_sess_vld) {
			ret = otg_start_gadget(fsm, 0);
			if (!ret)
				phy->state = OTG_STATE_B_IDLE;
			else
				pr_err("OTG SM: cannot stop gadget\n");
		}
		break;
	case OTG_STATE_A_IDLE:
		if (fsm->id) {
			phy->state = OTG_STATE_B_IDLE;
		} else {
			ret = otg_start_host(fsm, 1);
			if (!ret) {
				otg_drv_vbus(fsm, 1);
				phy->state = OTG_STATE_A_HOST;
			} else {
				pr_err("OTG SM: cannot start host\n");
			}
		}
		break;
	case OTG_STATE_A_HOST:
		if (fsm->id) {
			otg_drv_vbus(fsm, 0);
			ret = otg_start_host(fsm, 0);
			if (!ret)
				phy->state = OTG_STATE_A_IDLE;
			else
				pr_err("OTG SM: cannot stop host\n");
		}
		break;
	default:
		pr_err("OTG SM: invalid state\n");
	}

exit:
	if (!ret)
		ret = (phy->state != prev_state);

	pr_debug("OTG SM: %s => %s\n", usb_otg_state_string(prev_state),
		(ret > 0) ? usb_otg_state_string(phy->state) : "(no change)");

	return ret;
}