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arm: omap: craneboard: Add USB EHCI support

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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>
This commit is contained in:
Srinath 2010-12-23 12:17:48 -08:00 committed by Tony Lindgren
parent 0b50c691f9
commit 840b929680
1 changed files with 48 additions and 0 deletions
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48
arch/arm/mach-omap2/board-am3517crane.c
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@ -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")