usb: host: Add EHCI driver for NVIDIA Tegra SoCs

The Tegra 2 SoC has 3 EHCI compatible USB controllers. This patch adds
the necessary glue to allow the ehci-hcd driver to work on Tegra 2
SoCs.

The platform data is used to configure board-specific phy settings and
to configure the operating mode, as one of the ports may be used as a otg
port. For additional power saving, the driver supports powering down the
phy on bus suspend when it is used, for example, to connect an internal
device that use an out-of-band remote wakeup mechanism (e.g. a gpio).

Signed-off-by: Benoit Goby <benoit@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 34 insertions, 1 deletions

diff --git a/include/linux/platform_data/tegra_usb.h b/include/linux/platform_data/tegra_usb.h
new file mode 100644
index 00000000000..6bca5b569ac
--- /dev/null
+++ b/include/linux/platform_data/tegra_usb.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _TEGRA_USB_H_
+#define _TEGRA_USB_H_
+
+enum tegra_usb_operating_modes {
+	TEGRA_USB_DEVICE,
+	TEGRA_USB_HOST,
+	TEGRA_USB_OTG,
+};
+
+struct tegra_ehci_platform_data {
+	enum tegra_usb_operating_modes operating_mode;
+	/* power down the phy on bus suspend */
+	int power_down_on_bus_suspend;
+	void *phy_config;
+};
+
+#endif /* _TEGRA_USB_H_ */
diff --git a/include/linux/usb/ehci_def.h b/include/linux/usb/ehci_def.h
index 2e262cb1542..65638024519 100644
--- a/include/linux/usb/ehci_def.h
+++ b/include/linux/usb/ehci_def.h
@@ -127,7 +127,9 @@ struct ehci_regs {
 #define PORT_WKDISC_E	(1<<21)		/* wake on disconnect (enable) */
 #define PORT_WKCONN_E	(1<<20)		/* wake on connect (enable) */
 /* 19:16 for port testing */
-#define PORT_TEST_PKT	(0x4<<16)	/* Port Test Control - packet test */
+#define PORT_TEST(x)	(((x)&0xf)<<16)	/* Port Test Control */
+#define PORT_TEST_PKT	PORT_TEST(0x4)	/* Port Test Control - packet test */
+#define PORT_TEST_FORCE	PORT_TEST(0x5)	/* Port Test Control - force enable */
 #define PORT_LED_OFF	(0<<14)
 #define PORT_LED_AMBER	(1<<14)
 #define PORT_LED_GREEN	(2<<14)