예제 #1
0
파일: core.c 프로젝트: Xilinx/linux-xlnx
static int dwc3_core_init_mode(struct dwc3 *dwc)
{
	struct device *dev = dwc->dev;
	int ret;

	switch (dwc->dr_mode) {
	case USB_DR_MODE_PERIPHERAL:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);

		if (dwc->usb2_phy)
			otg_set_vbus(dwc->usb2_phy->otg, false);
		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);

		ret = dwc3_gadget_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize gadget\n");
			return ret;
		}
		break;
	case USB_DR_MODE_HOST:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);

		if (dwc->usb2_phy)
			otg_set_vbus(dwc->usb2_phy->otg, true);
		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);

		ret = dwc3_host_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize host\n");
			return ret;
		}
		phy_calibrate(dwc->usb2_generic_phy);
		break;
	case USB_DR_MODE_OTG:
		INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
		ret = dwc3_drd_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize dual-role\n");
			return ret;
		}

#if IS_ENABLED(CONFIG_USB_DWC3_OTG)
		dwc->current_dr_role = 0;
		dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
#endif
		break;
	default:
		dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
		return -EINVAL;
	}

	return 0;
}
예제 #2
0
파일: core.c 프로젝트: asmalldev/linux
static int dwc3_core_init_mode(struct dwc3 *dwc)
{
	struct device *dev = dwc->dev;
	int ret;

	switch (dwc->dr_mode) {
	case USB_DR_MODE_PERIPHERAL:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
		ret = dwc3_gadget_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize gadget\n");
			return ret;
		}
		break;
	case USB_DR_MODE_HOST:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
		ret = dwc3_host_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize host\n");
			return ret;
		}
		break;
	case USB_DR_MODE_OTG:
		INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
		ret = dwc3_drd_init(dwc);
		if (ret) {
			if (ret != -EPROBE_DEFER)
				dev_err(dev, "failed to initialize dual-role\n");
			return ret;
		}
		break;
	default:
		dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
		return -EINVAL;
	}

	return 0;
}
예제 #3
0
파일: core.c 프로젝트: asmalldev/linux
static void __dwc3_set_mode(struct work_struct *work)
{
	struct dwc3 *dwc = work_to_dwc(work);
	unsigned long flags;
	int ret;

	if (!dwc->desired_dr_role)
		return;

	if (dwc->desired_dr_role == dwc->current_dr_role)
		return;

	if (dwc->dr_mode != USB_DR_MODE_OTG)
		return;

	switch (dwc->current_dr_role) {
	case DWC3_GCTL_PRTCAP_HOST:
		dwc3_host_exit(dwc);
		break;
	case DWC3_GCTL_PRTCAP_DEVICE:
		dwc3_gadget_exit(dwc);
		dwc3_event_buffers_cleanup(dwc);
		break;
	default:
		break;
	}

	spin_lock_irqsave(&dwc->lock, flags);

	dwc3_set_prtcap(dwc, dwc->desired_dr_role);

	dwc->current_dr_role = dwc->desired_dr_role;

	spin_unlock_irqrestore(&dwc->lock, flags);

	switch (dwc->desired_dr_role) {
	case DWC3_GCTL_PRTCAP_HOST:
		ret = dwc3_host_init(dwc);
		if (ret)
			dev_err(dwc->dev, "failed to initialize host\n");
		break;
	case DWC3_GCTL_PRTCAP_DEVICE:
		dwc3_event_buffers_setup(dwc);
		ret = dwc3_gadget_init(dwc);
		if (ret)
			dev_err(dwc->dev, "failed to initialize peripheral\n");
		break;
	default:
		break;
	}
}
예제 #4
0
파일: core.c 프로젝트: Xilinx/linux-xlnx
/**
 * dwc3_core_init - Low-level initialization of DWC3 Core
 * @dwc: Pointer to our controller context structure
 *
 * Returns 0 on success otherwise negative errno.
 */
int dwc3_core_init(struct dwc3 *dwc)
{
	u32			reg;
	int			ret;

	if (!dwc3_core_is_valid(dwc)) {
		dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
		ret = -ENODEV;
		goto err0;
	}

	/*
	 * Write Linux Version Code to our GUID register so it's easy to figure
	 * out which kernel version a bug was found.
	 */
	dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);

	/* Handle USB2.0-only core configuration */
	if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
			DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {
		if (dwc->maximum_speed == USB_SPEED_SUPER)
			dwc->maximum_speed = USB_SPEED_HIGH;
	}

	ret = dwc3_phy_setup(dwc);
	if (ret)
		goto err0;

	if (!dwc->ulpi_ready) {
		ret = dwc3_core_ulpi_init(dwc);
		if (ret)
			goto err0;
		dwc->ulpi_ready = true;
	}

	if (!dwc->phys_ready) {
		ret = dwc3_core_get_phy(dwc);
		if (ret)
			goto err0a;
		dwc->phys_ready = true;
	}

	ret = dwc3_core_soft_reset(dwc);
	if (ret)
		goto err0a;

	dwc3_core_setup_global_control(dwc);
	dwc3_core_num_eps(dwc);

	if (dwc->scratchbuf == NULL) {
		ret = dwc3_alloc_scratch_buffers(dwc);
		if (ret) {
			dev_err(dwc->dev,
				"Not enough memory for scratch buffers\n");
			goto err1;
		}
	}

	ret = dwc3_setup_scratch_buffers(dwc);
	if (ret) {
		dev_err(dwc->dev, "Failed to setup scratch buffers: %d\n", ret);
		goto err1;
	}

	/* Adjust Frame Length */
	dwc3_frame_length_adjustment(dwc);

	dwc3_set_incr_burst_type(dwc);

	ret = dwc3_config_soc_bus(dwc);
	if (ret)
		goto err1;

	usb_phy_set_suspend(dwc->usb2_phy, 0);
	usb_phy_set_suspend(dwc->usb3_phy, 0);
	ret = phy_power_on(dwc->usb2_generic_phy);
	if (ret < 0)
		goto err2;

	ret = phy_power_on(dwc->usb3_generic_phy);
	if (ret < 0)
		goto err3;

	ret = dwc3_event_buffers_setup(dwc);
	if (ret) {
		dev_err(dwc->dev, "failed to setup event buffers\n");
		goto err4;
	}

	switch (dwc->dr_mode) {
	case USB_DR_MODE_PERIPHERAL:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
		break;
	case USB_DR_MODE_HOST:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
		break;
	case USB_DR_MODE_OTG:
		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_OTG);
		break;
	default:
		dev_warn(dwc->dev, "Unsupported mode %d\n", dwc->dr_mode);
		break;
	}

	/*
	 * ENDXFER polling is available on version 3.10a and later of
	 * the DWC_usb3 controller. It is NOT available in the
	 * DWC_usb31 controller.
	 */
	if (!dwc3_is_usb31(dwc) && dwc->revision >= DWC3_REVISION_310A) {
		reg = dwc3_readl(dwc->regs, DWC3_GUCTL2);
		reg |= DWC3_GUCTL2_RST_ACTBITLATER;
		dwc3_writel(dwc->regs, DWC3_GUCTL2, reg);
	}

	/* When configured in HOST mode, after issuing U3/L2 exit controller
	 * fails to send proper CRC checksum in CRC5 feild. Because of this
	 * behaviour Transaction Error is generated, resulting in reset and
	 * re-enumeration of usb device attached. Enabling bit 10 of GUCTL1
	 * will correct this problem
	 */
	if (dwc->enable_guctl1_resume_quirk) {
		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
		reg |= DWC3_GUCTL1_RESUME_QUIRK;
		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
	}

	/* SNPS controller when configureed in HOST mode maintains Inter Packet
	 * Delay (IPD) of ~380ns which works with most of the super-speed hubs
	 * except VIA-LAB hubs. When IPD is ~380ns HOST controller fails to
	 * enumerate FS/LS devices when connected behind VIA-LAB hubs.
	 * Enabling bit 9 of GUCTL1 enables the workaround in HW to reduce the
	 * ULPI clock latency by 1 cycle, thus reducing the IPD (~360ns) and
	 * making controller enumerate FS/LS devices connected behind VIA-LAB.
	 */
	if (dwc->enable_guctl1_ipd_quirk) {
		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
		reg |= DWC3_GUCTL1_IPD_QUIRK;
		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
	}

	if (dwc->revision >= DWC3_REVISION_250A) {
		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);

		/*
		 * Enable hardware control of sending remote wakeup
		 * in HS when the device is in the L1 state.
		 */
		if (dwc->revision >= DWC3_REVISION_290A)
			reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW;

		if (dwc->dis_tx_ipgap_linecheck_quirk)
			reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS;

		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
	}

	if (dwc->dr_mode == USB_DR_MODE_HOST ||
	    dwc->dr_mode == USB_DR_MODE_OTG) {
		reg = dwc3_readl(dwc->regs, DWC3_GUCTL);

		/*
		 * Enable Auto retry Feature to make the controller operating in
		 * Host mode on seeing transaction errors(CRC errors or internal
		 * overrun scenerios) on IN transfers to reply to the device
		 * with a non-terminating retry ACK (i.e, an ACK transcation
		 * packet with Retry=1 & Nump != 0)
		 */
		reg |= DWC3_GUCTL_HSTINAUTORETRY;

		dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
	}

	/*
	 * Must config both number of packets and max burst settings to enable
	 * RX and/or TX threshold.
	 */
	if (dwc3_is_usb31(dwc) && dwc->dr_mode == USB_DR_MODE_HOST) {
		u8 rx_thr_num = dwc->rx_thr_num_pkt_prd;
		u8 rx_maxburst = dwc->rx_max_burst_prd;
		u8 tx_thr_num = dwc->tx_thr_num_pkt_prd;
		u8 tx_maxburst = dwc->tx_max_burst_prd;

		if (rx_thr_num && rx_maxburst) {
			reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG);
			reg |= DWC31_RXTHRNUMPKTSEL_PRD;

			reg &= ~DWC31_RXTHRNUMPKT_PRD(~0);
			reg |= DWC31_RXTHRNUMPKT_PRD(rx_thr_num);

			reg &= ~DWC31_MAXRXBURSTSIZE_PRD(~0);
			reg |= DWC31_MAXRXBURSTSIZE_PRD(rx_maxburst);

			dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg);
		}

		if (tx_thr_num && tx_maxburst) {
			reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG);
			reg |= DWC31_TXTHRNUMPKTSEL_PRD;

			reg &= ~DWC31_TXTHRNUMPKT_PRD(~0);
			reg |= DWC31_TXTHRNUMPKT_PRD(tx_thr_num);

			reg &= ~DWC31_MAXTXBURSTSIZE_PRD(~0);
			reg |= DWC31_MAXTXBURSTSIZE_PRD(tx_maxburst);

			dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, reg);
		}
	}

	return 0;

err4:
	phy_power_off(dwc->usb3_generic_phy);

err3:
	phy_power_off(dwc->usb2_generic_phy);

err2:
	usb_phy_set_suspend(dwc->usb2_phy, 1);
	usb_phy_set_suspend(dwc->usb3_phy, 1);

err1:
	usb_phy_shutdown(dwc->usb2_phy);
	usb_phy_shutdown(dwc->usb3_phy);
	phy_exit(dwc->usb2_generic_phy);
	phy_exit(dwc->usb3_generic_phy);

err0a:
	dwc3_ulpi_exit(dwc);

err0:
	return ret;
}
예제 #5
0
파일: core.c 프로젝트: Xilinx/linux-xlnx
static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
{
	unsigned long	flags;
	int		ret;
	u32		reg;

	/* Bring core to D0 state */
	dwc3_set_usb_core_power(dwc, true);

	ret = dwc3_core_init(dwc);
	if (ret)
		return ret;

	switch (dwc->current_dr_role) {
	case DWC3_GCTL_PRTCAP_DEVICE:
		ret = dwc3_core_init_for_resume(dwc);
		if (ret)
			return ret;

		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
		spin_lock_irqsave(&dwc->lock, flags);
		dwc3_gadget_resume(dwc);
		spin_unlock_irqrestore(&dwc->lock, flags);
		break;
	case DWC3_GCTL_PRTCAP_HOST:
		if (!PMSG_IS_AUTO(msg)) {
			ret = dwc3_core_init_for_resume(dwc);
			if (ret)
				return ret;
			dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
			break;
		}
		/* Restore GUSB2PHYCFG bits that were modified in suspend */
		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
		if (dwc->dis_u2_susphy_quirk)
			reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;

		if (dwc->dis_enblslpm_quirk)
			reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;

		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);

		phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
		phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
		break;
	case DWC3_GCTL_PRTCAP_OTG:
		/* nothing to do on runtime_resume */
		if (PMSG_IS_AUTO(msg))
			break;

		ret = dwc3_core_init(dwc);
		if (ret)
			return ret;

		dwc3_set_prtcap(dwc, dwc->current_dr_role);

		dwc3_otg_init(dwc);
		if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST) {
			dwc3_otg_host_init(dwc);
		} else if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) {
			spin_lock_irqsave(&dwc->lock, flags);
			dwc3_gadget_resume(dwc);
			spin_unlock_irqrestore(&dwc->lock, flags);
		}

		break;
	default:
		/* do nothing */
		break;
	}

	return 0;
}
예제 #6
0
파일: core.c 프로젝트: Xilinx/linux-xlnx
static void __dwc3_set_mode(struct work_struct *work)
{
	struct dwc3 *dwc = work_to_dwc(work);
	unsigned long flags;
	int ret;

	if (dwc->dr_mode != USB_DR_MODE_OTG)
		return;

	if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG)
		dwc3_otg_update(dwc, 0);

	if (!dwc->desired_dr_role)
		return;

	if (dwc->desired_dr_role == dwc->current_dr_role)
		return;

	if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev)
		return;

	switch (dwc->current_dr_role) {
	case DWC3_GCTL_PRTCAP_HOST:
		dwc3_host_exit(dwc);
		break;
	case DWC3_GCTL_PRTCAP_DEVICE:
		dwc3_gadget_exit(dwc);
		dwc3_event_buffers_cleanup(dwc);
		break;
	case DWC3_GCTL_PRTCAP_OTG:
		dwc3_otg_exit(dwc);
		spin_lock_irqsave(&dwc->lock, flags);
		dwc->desired_otg_role = DWC3_OTG_ROLE_IDLE;
		spin_unlock_irqrestore(&dwc->lock, flags);
		dwc3_otg_update(dwc, 1);
		break;
	default:
		break;
	}

	spin_lock_irqsave(&dwc->lock, flags);

	dwc3_set_prtcap(dwc, dwc->desired_dr_role);

	spin_unlock_irqrestore(&dwc->lock, flags);

	switch (dwc->desired_dr_role) {
	case DWC3_GCTL_PRTCAP_HOST:
		ret = dwc3_host_init(dwc);
		if (ret) {
			dev_err(dwc->dev, "failed to initialize host\n");
		} else {
			if (dwc->usb2_phy)
				otg_set_vbus(dwc->usb2_phy->otg, true);
			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
			phy_calibrate(dwc->usb2_generic_phy);
		}
		break;
	case DWC3_GCTL_PRTCAP_DEVICE:
		dwc3_event_buffers_setup(dwc);

		if (dwc->usb2_phy)
			otg_set_vbus(dwc->usb2_phy->otg, false);
		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);

		ret = dwc3_gadget_init(dwc);
		if (ret)
			dev_err(dwc->dev, "failed to initialize peripheral\n");
		break;
	case DWC3_GCTL_PRTCAP_OTG:
		dwc3_otg_init(dwc);
		dwc3_otg_update(dwc, 0);
		break;
	default:
		break;
	}

}