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ARM: imx/mx27_3ds: Add USB OTG support

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Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Fabio Estevam 2010-12-22 12:25:31 -02:00 committed by Sascha Hauer
parent 130a0ddad9
commit 96cf4239c7
2 changed files with 74 additions and 0 deletions
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3
arch/arm/mach-imx/Kconfig
View file

@ -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.

71
arch/arm/mach-imx/mach-mx27_3ds.c
View file

@ -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)