Some devices with A female host port and without use of usb_id pin will need this for the otg controller works as device role during firmware period and works as host role in rich os. Signed-off-by: Kever Yang <kever.yang@xxxxxxxxxxxxxx> --- Changes in v2: - put spaces around '+' operator - expand the comment for dr_mode - handle dr_mode is USB_DR_MODE_OTG drivers/usb/dwc2/core.c | 18 ++++++++++++++++++ drivers/usb/dwc2/core.h | 5 +++++ drivers/usb/dwc2/platform.c | 4 ++++ 3 files changed, 27 insertions(+) diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 27d2c9b..738bec2 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -118,6 +118,7 @@ static int dwc2_core_reset(struct dwc2_hsotg *hsotg) { u32 greset; int count = 0; + u32 gusbcfg; dev_vdbg(hsotg->dev, "%s()\n", __func__); @@ -148,6 +149,23 @@ static int dwc2_core_reset(struct dwc2_hsotg *hsotg) } } while (greset & GRSTCTL_CSFTRST); + if (hsotg->dr_mode == USB_DR_MODE_HOST) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEDEVMODE; + gusbcfg |= GUSBCFG_FORCEHOSTMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; + gusbcfg |= GUSBCFG_FORCEDEVMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } else if (hsotg->dr_mode == USB_DR_MODE_OTG) { + gusbcfg = readl(hsotg->regs + GUSBCFG); + gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; + gusbcfg &= ~GUSBCFG_FORCEDEVMODE; + writel(gusbcfg, hsotg->regs + GUSBCFG); + } + /* * NOTE: This long sleep is _very_ important, otherwise the core will * not stay in host mode after a connector ID change! diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 1efd10c..a34681c 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -501,6 +501,10 @@ struct dwc2_hw_params { * a_peripheral and b_device=>b_host) this may not match * the core, but allows the software to determine * transitions + * @dr_mode: Requested mode of operation, one of following: + * - USB_DR_MODE_PERIPHERAL + * - USB_DR_MODE_HOST + * - USB_DR_MODE_OTG * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth * transfer are in process of being queued * @srp_success: Stores status of SRP request in the case of a FS PHY @@ -592,6 +596,7 @@ struct dwc2_hsotg { /** Params to actually use */ struct dwc2_core_params *core_params; enum usb_otg_state op_state; + enum usb_dr_mode dr_mode; unsigned int queuing_high_bandwidth:1; unsigned int srp_success:1; diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index b14668b..669a03a 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -42,6 +42,8 @@ #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/usb/of.h> + #include "core.h" #include "hcd.h" @@ -200,6 +202,8 @@ static int dwc2_driver_probe(struct platform_device *dev) dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n", (unsigned long)res->start, hsotg->regs); + hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node); + retval = dwc2_hcd_init(hsotg, irq, params); if (retval) return retval; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html