From: Lubomir Rintel <lkundrak@v3.sk>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Lubomir Rintel <lkundrak@v3.sk>
Subject: [PATCH] USB: EHCI: ehci-mv: add HSIC support
Date: Fri, 20 Dec 2019 08:02:18 +0100 [thread overview]
Message-ID: <20191220070218.240053-1-lkundrak@v3.sk> (raw)
Some special dance is needed to initialize the HSIC port.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
drivers/usb/host/ehci-mv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index 66ec1fdf9fe7d..21eb32baf9380 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -11,6 +11,7 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/usb/otg.h>
+#include <linux/usb/of.h>
#include <linux/platform_data/mv_usb.h>
#include <linux/io.h>
@@ -67,6 +68,8 @@ static int mv_ehci_reset(struct usb_hcd *hcd)
{
struct device *dev = hcd->self.controller;
struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd);
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ u32 status;
int retval;
if (ehci_mv == NULL) {
@@ -80,6 +83,14 @@ static int mv_ehci_reset(struct usb_hcd *hcd)
if (retval)
dev_err(dev, "ehci_setup failed %d\n", retval);
+ if (of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) {
+ status = ehci_readl(ehci, &ehci->regs->port_status[0]);
+ status |= PORT_TEST_FORCE;
+ ehci_writel(ehci, status, &ehci->regs->port_status[0]);
+ status &= ~PORT_TEST_FORCE;
+ ehci_writel(ehci, status, &ehci->regs->port_status[0]);
+ }
+
return retval;
}
--
2.24.1
reply other threads:[~2019-12-20 7:02 UTC|newest]
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