From mboxrd@z Thu Jan 1 00:00:00 1970 From: manish.narani@xilinx.com (Manish Narani) Date: Wed, 4 Jan 2017 18:53:01 +0530 Subject: [RFC PATCH] usb: host: xhci: plat: add support for otg_set_host() call In-Reply-To: <1483536181-22356-1-git-send-email-mnarani@xilinx.com> References: <1483536181-22356-1-git-send-email-mnarani@xilinx.com> Message-ID: <1483536181-22356-7-git-send-email-mnarani@xilinx.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch will add support for OTG host initialization. This will help OTG drivers to populate their host subsystem. Signed-off-by: Manish Narani --- drivers/usb/host/xhci-plat.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index ddfab30..aa08bdd 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "xhci.h" #include "xhci-plat.h" @@ -144,6 +145,37 @@ static const struct of_device_id usb_xhci_of_match[] = { MODULE_DEVICE_TABLE(of, usb_xhci_of_match); #endif +static int usb_otg_set_host(struct device *dev, struct usb_hcd *hcd, bool yes) +{ + int ret = 0; + + hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB3); + if (!IS_ERR_OR_NULL(hcd->usb_phy) && hcd->usb_phy->otg) { + dev_dbg(dev, "%s otg support available\n", __func__); + if (yes) { + if (otg_set_host(hcd->usb_phy->otg, &hcd->self)) { + dev_err(dev, "%s otg_set_host failed\n", + __func__); + usb_put_phy(hcd->usb_phy); + goto disable_phy; + } + } else { + ret = otg_set_host(hcd->usb_phy->otg, NULL); + usb_put_phy(hcd->usb_phy); + goto disable_phy; + } + + } else + goto disable_phy; + + return 0; + +disable_phy: + hcd->usb_phy = NULL; + + return ret; +} + static int xhci_plat_probe(struct platform_device *pdev) { const struct of_device_id *match; @@ -255,6 +287,11 @@ static int xhci_plat_probe(struct platform_device *pdev) if (ret) goto dealloc_usb2_hcd; + ret = usb_otg_set_host(&pdev->dev, hcd, 1); + if (ret) + goto dealloc_usb2_hcd; + + return 0; @@ -283,6 +320,8 @@ static int xhci_plat_remove(struct platform_device *dev) struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct clk *clk = xhci->clk; + usb_otg_set_host(&dev->dev, hcd, 0); + usb_remove_hcd(xhci->shared_hcd); usb_phy_shutdown(hcd->usb_phy); -- 2.1.1