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authorSrinath <srinath@mistralsolutions.com>2010-12-23 12:17:48 -0800
committerTony Lindgren <tony@atomide.com>2010-12-23 12:17:48 -0800
commit840b929680c0d79f5248724d1b6b6d3f2ca3159e (patch)
treebfbca26e9ad82018e99585a898c652188b333424 /arch/arm
parent0b50c691f93a973136dc821ef11372ffdfae9646 (diff)
downloadblackbird-op-linux-840b929680c0d79f5248724d1b6b6d3f2ca3159e.tar.gz
blackbird-op-linux-840b929680c0d79f5248724d1b6b6d3f2ca3159e.zip
arm: omap: craneboard: Add USB EHCI support
AM3517/05 Craneboard has one EHCI interface on board using port1. GPIO35 is used as power enable. GPIO38 is used as port1 PHY reset. History: http://marc.info/?l=linux-omap&w=2&r=1&s=Craneboard%253A%2BAdd%2BUSB%2BEHCI%2Bsupport&q=b Signed-off-by: Srinath <srinath@mistralsolutions.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-omap2/board-am3517crane.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-am3517crane.c b/arch/arm/mach-omap2/board-am3517crane.c
index 781ed2558e12..71acb5ab281c 100644
--- a/arch/arm/mach-omap2/board-am3517crane.c
+++ b/arch/arm/mach-omap2/board-am3517crane.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/gpio.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -27,8 +28,14 @@
#include <plat/board.h>
#include <plat/common.h>
+#include <plat/usb.h>
#include "mux.h"
+#include "control.h"
+
+#define GPIO_USB_POWER 35
+#define GPIO_USB_NRESET 38
+
/* Board initialization */
static struct omap_board_config_kernel am3517_crane_config[] __initdata = {
@@ -52,10 +59,51 @@ static void __init am3517_crane_init_irq(void)
omap_init_irq();
}
+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] = GPIO_USB_NRESET,
+ .reset_gpio_port[1] = -EINVAL,
+ .reset_gpio_port[2] = -EINVAL
+};
+
static void __init am3517_crane_init(void)
{
+ int ret;
+
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
omap_serial_init();
+
+ /* Configure GPIO for EHCI port */
+ if (omap_mux_init_gpio(GPIO_USB_NRESET, OMAP_PIN_OUTPUT)) {
+ pr_err("Can not configure mux for GPIO_USB_NRESET %d\n",
+ GPIO_USB_NRESET);
+ return;
+ }
+
+ if (omap_mux_init_gpio(GPIO_USB_POWER, OMAP_PIN_OUTPUT)) {
+ pr_err("Can not configure mux for GPIO_USB_POWER %d\n",
+ GPIO_USB_POWER);
+ return;
+ }
+
+ ret = gpio_request(GPIO_USB_POWER, "usb_ehci_enable");
+ if (ret < 0) {
+ pr_err("Can not request GPIO %d\n", GPIO_USB_POWER);
+ return;
+ }
+
+ ret = gpio_direction_output(GPIO_USB_POWER, 1);
+ if (ret < 0) {
+ gpio_free(GPIO_USB_POWER);
+ pr_err("Unable to initialize EHCI power\n");
+ return;
+ }
+
+ usb_ehci_init(&ehci_pdata);
}
MACHINE_START(CRANEBOARD, "AM3517/05 CRANEBOARD")
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