linux-kernel - [Patch v1] AM35xx: Craneboard: Add USB EHCI support

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Message-Id: <1290182862-21837-1-git-send-email-srinath@mistralsolutions.com>
Date:	Fri, 19 Nov 2010 21:37:42 +0530
From:	srinath@...tralsolutions.com
To:	linux-omap@...r.kernel.org
Cc:	jdk@...com, tony@...mide.com, linux-kernel@...r.kernel.org,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	khilman@...prootsystems.com, nm@...com,
	nagendra@...tralsolutions.com, umeshk@...tralsolutions.com,
	Srinath <srinath@...tralsolutions.com>
Subject: [Patch v1] AM35xx: Craneboard: Add USB EHCI support

From: Srinath <srinath@...tralsolutions.com>

AM3517/05 Craneboard has one EHCI interface on board using port1.

GPIO35 is used as power enable.
GPIO38 is used as port1 PHY reset.

Signed-off-by: Srinath <srinath@...tralsolutions.com>
---
 arch/arm/mach-omap2/board-am3517crane.c |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-am3517crane.c b/arch/arm/mach-omap2/board-am3517crane.c
index 13ead33..0e1a806 100644
--- a/arch/arm/mach-omap2/board-am3517crane.c
+++ b/arch/arm/mach-omap2/board-am3517crane.c
@@ -28,8 +28,10 @@
 
 #include <plat/board.h>
 #include <plat/common.h>
+#include <plat/usb.h>
 
 #include "mux.h"
+#include "control.h"
 
 /* Board initialization */
 static struct omap_board_config_kernel am3517_crane_config[] __initdata = {
@@ -53,10 +55,29 @@ static void __init am3517_crane_init_irq(void)
 	omap_gpio_init();
 }
 
+static struct ehci_hcd_omap_platform_data ehci_pdata __initdata = {
+	.port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
+	.port_mode[1] = EHCI_HCD_OMAP_MODE_UNKNOWN,
+	.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
+
+	.phy_reset  = true,
+	.reset_gpio_port[0]  = 38,
+	.reset_gpio_port[1]  = -EINVAL,
+	.reset_gpio_port[2]  = -EINVAL
+};
+
 static void __init am3517_crane_init(void)
 {
 	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
 	omap_serial_init();
+
+	/* Configure GPIO for EHCI port */
+	omap_mux_init_gpio(35, OMAP_PIN_OUTPUT);
+	gpio_request(35, "usb_ehci_enable");
+	gpio_direction_output(35, 1);
+	gpio_set_value(35, 1);
+	omap_mux_init_gpio(38, OMAP_PIN_OUTPUT);
+	usb_ehci_init(&ehci_pdata);
 }
 
 MACHINE_START(CRANEBOARD, "AM3517/05 CRANEBOARD")
-- 
1.7.1.226.g770c5

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