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authorRoger Quadros <rogerq@ti.com>2013-03-13 17:14:43 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-15 22:54:21 +0400
commit49f092198f4fd2c70847de7151d33df08929af51 (patch)
treefb9a65f0feae7e37d9715ae3ea635c63a281e861 /drivers/usb/host/ehci-omap.c
parenta2f450ca88a394e282f09e5e16f9de60cd487f80 (diff)
downloadlinux-49f092198f4fd2c70847de7151d33df08929af51.tar.xz
USB: ehci-omap: Fix detection in HSIC mode
Move PHY initialization until after EHCI initialization is complete, instead of initializing the PHYs first, shutting them down again, and then initializing them a second time. This fixes HSIC device detection. Signed-off-by: Roger Quadros <rogerq@ti.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-omap.c')
-rw-r--r--drivers/usb/host/ehci-omap.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 1ba1df89a436..755b428019a1 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -90,26 +90,13 @@ static inline u32 ehci_read(void __iomem *base, u32 reg)
static int omap_ehci_init(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- struct omap_hcd *omap = (struct omap_hcd *)ehci->priv;
- int rc, i;
-
- /* Hold PHYs in reset while initializing EHCI controller */
- for (i = 0; i < omap->nports; i++) {
- if (omap->phy[i])
- usb_phy_shutdown(omap->phy[i]);
- }
+ int rc;
/* we know this is the memory we want, no need to ioremap again */
ehci->caps = hcd->regs;
rc = ehci_setup(hcd);
- /* Bring PHYs out of reset */
- for (i = 0; i < omap->nports; i++) {
- if (omap->phy[i])
- usb_phy_init(omap->phy[i]);
- }
-
return rc;
}
@@ -219,9 +206,6 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
}
omap->phy[i] = phy;
- usb_phy_init(omap->phy[i]);
- /* bring PHY out of suspend */
- usb_phy_set_suspend(omap->phy[i], 0);
}
pm_runtime_enable(dev);
@@ -245,6 +229,20 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
goto err_pm_runtime;
}
+ /*
+ * Bring PHYs out of reset.
+ * Even though HSIC mode is a PHY-less mode, the reset
+ * line exists between the chips and can be modelled
+ * as a PHY device for reset control.
+ */
+ for (i = 0; i < omap->nports; i++) {
+ if (!omap->phy[i])
+ continue;
+
+ usb_phy_init(omap->phy[i]);
+ /* bring PHY out of suspend */
+ usb_phy_set_suspend(omap->phy[i], 0);
+ }
return 0;