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Commit 4415beb6 authored by David Anders's avatar David Anders Committed by Tony Lindgren
Browse files

omap4: pandaboard: enable the ehci port on pandaboard 



The OMAP4 PandaBoard has EHCI port1 hooked up to an external
SMSC3320 transciever. GPIO 1 is used to power on the transceiver
and GPIO 62 for reset on the transceiver.

Signed-off-by: default avatarDavid Anders <x0132446@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent b9b52620

arch/arm/mach-omap2/board-omap4panda.c

+54 −0
Original line number Diff line number Diff line
@@ -41,6 +41,9 @@ 
#include "timer-gp.h"





#define GPIO_HUB_POWER		1

#define GPIO_HUB_NRESET		62



static struct gpio_led gpio_leds[] = {

	{

		.name			= "pandaboard::status1",
@@ -78,6 +81,56 @@ static void __init omap4_panda_init_irq(void) 
	omap_gpio_init();

}



static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {

	.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  = false,

	.reset_gpio_port[0]  = -EINVAL,

	.reset_gpio_port[1]  = -EINVAL,

	.reset_gpio_port[2]  = -EINVAL

};



static void __init omap4_ehci_init(void)

{

	int ret;





	/* disable the power to the usb hub prior to init */

	ret = gpio_request(GPIO_HUB_POWER, "hub_power");

	if (ret) {

		pr_err("Cannot request GPIO %d\n", GPIO_HUB_POWER);

		goto error1;

	}

	gpio_export(GPIO_HUB_POWER, 0);

	gpio_direction_output(GPIO_HUB_POWER, 0);

	gpio_set_value(GPIO_HUB_POWER, 0);



	/* reset phy+hub */

	ret = gpio_request(GPIO_HUB_NRESET, "hub_nreset");

	if (ret) {

		pr_err("Cannot request GPIO %d\n", GPIO_HUB_NRESET);

		goto error2;

	}

	gpio_export(GPIO_HUB_NRESET, 0);

	gpio_direction_output(GPIO_HUB_NRESET, 0);

	gpio_set_value(GPIO_HUB_NRESET, 0);

	gpio_set_value(GPIO_HUB_NRESET, 1);



	usb_ehci_init(&ehci_pdata);



	/* enable power to hub */

	gpio_set_value(GPIO_HUB_POWER, 1);

	return;



error2:

	gpio_free(GPIO_HUB_POWER);

error1:

	pr_err("Unable to initialize EHCI power/reset\n");

	return;



}



static struct omap_musb_board_data musb_board_data = {

	.interface_type		= MUSB_INTERFACE_UTMI,

	.mode			= MUSB_PERIPHERAL,
@@ -314,6 +367,7 @@ static void __init omap4_panda_init(void) 
	omap4_twl6030_hsmmc_init(mmc);

	/* OMAP4 Panda uses internal transceiver so register nop transceiver */

	usb_nop_xceiv_register();

	omap4_ehci_init();

	/* FIXME: allow multi-omap to boot until musb is updated for omap4 */

	if (!cpu_is_omap44xx())

		usb_musb_init(&musb_board_data);