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authorRoger Quadros <rogerq@ti.com>2013-06-14 16:52:07 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-17 13:56:25 -0700
commit4e5c9e6fa2d232a0686d5fe45cd1508484048936 (patch)
tree35afb0682959bc64e883ff9b14923da9f2c6b92a /drivers
parent8fefcfdd276be1459aaa2b2648037d2c0e1a3caa (diff)
downloadlinux-4e5c9e6fa2d232a0686d5fe45cd1508484048936.tar.bz2
USB: ehci-omap: Tweak PHY initialization sequence
For PHY mode, the PHYs must be brought out of reset before the EHCI controller is started. This patch fixes the issue where USB devices are not found on Beagleboard/Beagle-xm if USB has been started previously by the bootloader. (e.g. by "usb start" command in u-boot) Tested on Beagleboard, Beagleboard-xm and Pandaboard. Issue present on 3.10 onwards. Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Roger Quadros <rogerq@ti.com> Cc: stable <stable@vger.kernel.org> # 3.10 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/ehci-omap.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index bafa960ffd92..9bd7dfe3315b 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -187,6 +187,12 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
}
omap->phy[i] = phy;
+
+ if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY) {
+ usb_phy_init(omap->phy[i]);
+ /* bring PHY out of suspend */
+ usb_phy_set_suspend(omap->phy[i], 0);
+ }
}
pm_runtime_enable(dev);
@@ -211,13 +217,14 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
}
/*
- * Bring PHYs out of reset.
+ * Bring PHYs out of reset for non PHY modes.
* 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])
+ if (!omap->phy[i] ||
+ pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY)
continue;
usb_phy_init(omap->phy[i]);