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Commit 96cf4239 authored by Fabio Estevam's avatar Fabio Estevam Committed by Sascha Hauer
Browse files

ARM: imx/mx27_3ds: Add USB OTG support 



Signed-off-by: default avatarFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 130a0dda

arch/arm/mach-imx/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -235,10 +235,13 @@ endchoice 
config MACH_MX27_3DS

	bool "MX27PDK platform"

	select SOC_IMX27

	select IMX_HAVE_PLATFORM_FSL_USB2_UDC

	select IMX_HAVE_PLATFORM_IMX2_WDT

	select IMX_HAVE_PLATFORM_IMX_KEYPAD

	select IMX_HAVE_PLATFORM_IMX_UART

	select IMX_HAVE_PLATFORM_MXC_EHCI

	select IMX_HAVE_PLATFORM_MXC_MMC

	select MXC_ULPI if USB_ULPI

	help

	  Include support for MX27PDK platform. This includes specific

	  configurations for the board and its peripherals.

arch/arm/mach-imx/mach-mx27_3ds.c

+71 −0
Original line number Diff line number Diff line
@@ -23,16 +23,22 @@ 
#include <linux/platform_device.h>

#include <linux/gpio.h>

#include <linux/irq.h>

#include <linux/usb/otg.h>

#include <linux/usb/ulpi.h>

#include <linux/delay.h>



#include <asm/mach-types.h>

#include <asm/mach/arch.h>

#include <asm/mach/time.h>

#include <mach/hardware.h>

#include <mach/common.h>

#include <mach/iomux-mx27.h>

#include <mach/ulpi.h>



#include "devices-imx27.h"



#define SD1_EN_GPIO (GPIO_PORTB + 25)

#define OTG_PHY_RESET_GPIO (GPIO_PORTB + 23)



static const int mx27pdk_pins[] __initconst = {

	/* UART1 */
@@ -67,6 +73,20 @@ static const int mx27pdk_pins[] __initconst = { 
	PE22_PF_SD1_CMD,

	PE23_PF_SD1_CLK,

	SD1_EN_GPIO | GPIO_GPIO | GPIO_OUT,

	/* OTG */

	OTG_PHY_RESET_GPIO | GPIO_GPIO | GPIO_OUT,

	PC7_PF_USBOTG_DATA5,

	PC8_PF_USBOTG_DATA6,

	PC9_PF_USBOTG_DATA0,

	PC10_PF_USBOTG_DATA2,

	PC11_PF_USBOTG_DATA1,

	PC12_PF_USBOTG_DATA4,

	PC13_PF_USBOTG_DATA3,

	PE0_PF_USBOTG_NXT,

	PE1_PF_USBOTG_STP,

	PE2_PF_USBOTG_DIR,

	PE24_PF_USBOTG_CLK,

	PE25_PF_USBOTG_DATA7,

};



static const struct imxuart_platform_data uart_pdata __initconst = {
@@ -118,6 +138,45 @@ static void mx27_3ds_sdhc1_enable_level_translator(void) 
	gpio_direction_output(SD1_EN_GPIO, 1);

}





static int otg_phy_init(void)

{

	gpio_request(OTG_PHY_RESET_GPIO, "usb-otg-reset");

	gpio_direction_output(OTG_PHY_RESET_GPIO, 0);

	mdelay(1);

	gpio_set_value(OTG_PHY_RESET_GPIO, 1);

	return 0;

}



#if defined(CONFIG_USB_ULPI)



static struct mxc_usbh_platform_data otg_pdata __initdata = {

	.portsc	= MXC_EHCI_MODE_ULPI,

	.flags	= MXC_EHCI_INTERFACE_DIFF_UNI,

};

#endif



static const struct fsl_usb2_platform_data otg_device_pdata __initconst = {

	.operating_mode = FSL_USB2_DR_DEVICE,

	.phy_mode       = FSL_USB2_PHY_ULPI,

};



static int otg_mode_host;



static int __init mx27_3ds_otg_mode(char *options)

{

	if (!strcmp(options, "host"))

		otg_mode_host = 1;

	else if (!strcmp(options, "device"))

		otg_mode_host = 0;

	else

		pr_info("otg_mode neither \"host\" nor \"device\". "

			"Defaulting to device\n");

	return 0;

}

__setup("otg_mode=", mx27_3ds_otg_mode);





static void __init mx27pdk_init(void)

{

	mxc_gpio_setup_multiple_pins(mx27pdk_pins, ARRAY_SIZE(mx27pdk_pins),
@@ -128,6 +187,18 @@ static void __init mx27pdk_init(void) 
	imx27_add_imx_keypad(&mx27_3ds_keymap_data);

	imx27_add_mxc_mmc(0, &sdhc1_pdata);

	imx27_add_imx2_wdt(NULL);

	otg_phy_init();

#if defined(CONFIG_USB_ULPI)

	if (otg_mode_host) {

		otg_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,

				ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);



		imx27_add_mxc_ehci_otg(&otg_pdata);

	}

#endif

	if (!otg_mode_host)

		imx27_add_fsl_usb2_udc(&otg_device_pdata);



}



static void __init mx27pdk_timer_init(void)