Ping !!
-----Original Message-----
From: Manish Narani [mailto:manish.nar...@xilinx.com]
Sent: Thursday, December 15, 2016 1:24 PM
To: mathias.ny...@intel.com; gre...@linuxfoundation.org;
linux-...@vger.kernel.org; linux-kernel@vger.kernel.org
Cc: Anurag Kumar Vulisha <anura...@xilinx.com>; Punnaiah Choudary Kalluri
<punn...@xilinx.com>; Anirudha Sarangi <anir...@xilinx.com>; Manish Narani
<mnar...@xilinx.com>
Subject: [RFC PATCH] usb: host: xhci: plat: add support for otg_set_host() call
This patch will add support for OTG host initialization. This will help OTG
drivers to populate their host subsystem.
Signed-off-by: Manish Narani <mnar...@xilinx.com>
---
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 <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/acpi.h>
+#include <linux/usb/otg.h>
#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
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