linux-kernel - [PATCH 2.6.34-rc4 4/8] mx5: Add USB OTG port registration

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Date:	Tue, 13 Apr 2010 11:10:27 -0500
From:	Dinh.Nguyen@...escale.com
To:	linux-kernel@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org, linux@....linux.org.uk,
	s.hauer@...gutronix.de, valentin.longchamp@...l.ch,
	daniel@...aq.de, grant.likely@...retlab.ca,
	r.herring@...escale.com, bryan.wu@...onical.com,
	amit.kucheria@...onical.com,
	Dinh Nguyen <Dinh.Nguyen@...escale.com>
Subject: [PATCH 2.6.34-rc4 4/8] mx5: Add USB OTG port registration

From: Dinh Nguyen <Dinh.Nguyen@...escale.com>

This patch adds the device platform registration for enabling USB
host functionality on the OTG port on Freescale MX51 Babbage HW. This
file makes platform specific calls to initialize the USB HW.

This patch applies to 2.6.34-rc4.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@...escale.com>
---
 arch/arm/mach-mx5/Makefile             |    2 +-
 arch/arm/mach-mx5/board-mx51_babbage.c |    4 ++
 arch/arm/mach-mx5/usb_dr.c             |   57 ++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/mach-mx5/usb_dr.c

diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile
index bf23f86..3fca1f1 100644
--- a/arch/arm/mach-mx5/Makefile
+++ b/arch/arm/mach-mx5/Makefile
@@ -3,7 +3,7 @@
 #
 
 # Object file lists.
-obj-y   := cpu.o mm.o clock-mx51.o devices.o
+obj-y   := cpu.o mm.o clock-mx51.o devices.o usb_dr.o
 
 obj-$(CONFIG_MACH_MX51_BABBAGE) += board-mx51_babbage.o
 
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index afbe400..4e196d7 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -27,6 +27,8 @@
 
 #include "devices.h"
 
+extern void __init mx5_usb_dr_init(void);
+
 static struct platform_device *devices[] __initdata = {
 	&mxc_fec_device,
 };
@@ -78,6 +80,8 @@ static void __init mxc_board_init(void)
 	platform_add_devices(devices, ARRAY_SIZE(devices));
 
 	mxc_register_gpios();
+
+	mx5_usb_dr_init();
 }
 
 static void __init mx51_babbage_timer_init(void)
diff --git a/arch/arm/mach-mx5/usb_dr.c b/arch/arm/mach-mx5/usb_dr.c
new file mode 100644
index 0000000..52273ea
--- /dev/null
+++ b/arch/arm/mach-mx5/usb_dr.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/platform_device.h>
+#include <mach/mxc_ehci.h>
+#include <mach/common.h>
+#include "devices.h"
+
+extern int usbotg_init(struct platform_device *pdev);
+extern int usbotg_uninit(struct platform_device *pdev);
+
+static int usbotg_init_ext(struct platform_device *pdev);
+static int usbotg_uninit_ext(struct platform_device *pdev);
+
+/*
+ * platform data structs
+ * 	- Which one to use is determined by CONFIG options in usb.h
+ * 	- operating_mode plugged at run time
+ */
+static struct mxc_usbh_platform_data dr_utmi_config = {
+	.init	= usbotg_init_ext,
+	.exit	= usbotg_uninit_ext,
+	.portsc	= MXC_EHCI_UTMI_16BIT,
+	.flags	= MXC_EHCI_INTERNAL_PHY,
+};
+
+/* Notes: configure USB clock*/
+static int usbotg_init_ext(struct platform_device *pdev)
+{
+	return usbotg_init(pdev);
+}
+
+static int usbotg_uninit_ext(struct platform_device *pdev)
+{
+	return usbotg_uninit(pdev);
+}
+
+void __init mx5_usb_dr_init(void)
+{
+	mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
+}
-- 
1.6.0.4

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