From c65a34942e292e1f74af798c6ccbef17a072e238 Mon Sep 17 00:00:00 2001 From: Meng Dongyang Date: Thu, 8 Jun 2017 15:34:20 +0800 Subject: [PATCH] usb: dwc2: force to host mode if not support HNP/SRP In current code, after running the command of "usb start", the controller will keep in otg mode and can't switch to host mode if not support SNP/SRP capability. So add the property of "hnp-srp-disable" in the DTS to config the contrller work in force mode of host. Signed-off-by: Meng Dongyang --- drivers/usb/host/dwc2.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index bbaefd2334..841e596700 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -43,6 +43,7 @@ struct dwc2_priv { struct dwc2_core_regs *regs; int root_hub_devnum; bool ext_vbus; + bool hnp_srp_disable; bool oc_disable; }; @@ -394,6 +395,9 @@ static void dwc_otg_core_init(struct dwc2_priv *priv) usbcfg |= DWC2_GUSBCFG_ULPI_CLK_SUS_M; } #endif + if (priv->hnp_srp_disable) + usbcfg |= DWC2_GUSBCFG_FORCEHOSTMODE; + writel(usbcfg, ®s->gusbcfg); /* Program the GAHBCFG Register. */ @@ -422,12 +426,16 @@ static void dwc_otg_core_init(struct dwc2_priv *priv) writel(ahbcfg, ®s->gahbcfg); - /* Program the GUSBCFG register for HNP/SRP. */ - setbits_le32(®s->gusbcfg, DWC2_GUSBCFG_HNPCAP | DWC2_GUSBCFG_SRPCAP); + /* Program the capabilities in GUSBCFG Register */ + usbcfg = 0; + if (!priv->hnp_srp_disable) + usbcfg |= DWC2_GUSBCFG_HNPCAP | DWC2_GUSBCFG_SRPCAP; #ifdef CONFIG_DWC2_IC_USB_CAP - setbits_le32(®s->gusbcfg, DWC2_GUSBCFG_IC_USB_CAP); + usbcfg |= DWC2_GUSBCFG_IC_USB_CAP; #endif + + setbits_le32(®s->gusbcfg, usbcfg); } /* @@ -1244,6 +1252,11 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev) if (prop) priv->oc_disable = true; + prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), + "hnp-srp-disable", NULL); + if (prop) + priv->hnp_srp_disable = true; + return 0; } -- 2.39.5