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USB: EHCI: ehci-mv: add HSIC support

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Some special dance is needed to initialize the HSIC port.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20191221065008.266445-2-lkundrak@v3.sk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lubomir Rintel 2019-12-21 07:50:06 +01:00 • committed by Greg Kroah-Hartman
parent 92f983520c
commit 7b104f890a
1 changed files with 11 additions and 0 deletions
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11
drivers/usb/host/ehci-mv.c
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@ -11,6 +11,7 @@
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/usb/otg.h> #include <linux/usb/otg.h>
#include <linux/usb/of.h>
#include <linux/platform_data/mv_usb.h> #include <linux/platform_data/mv_usb.h>
#include <linux/io.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 device *dev = hcd->self.controller;
struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd); struct ehci_hcd_mv *ehci_mv = hcd_to_ehci_hcd_mv(hcd);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
u32 status;
int retval; int retval;
if (ehci_mv == NULL) { if (ehci_mv == NULL) {
@ -80,6 +83,14 @@ static int mv_ehci_reset(struct usb_hcd *hcd)
if (retval) if (retval)
dev_err(dev, "ehci_setup failed %d\n", 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; return retval;
} }