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Commit a2ef4562 authored by Magnus Lilja's avatar Magnus Lilja Committed by Sascha Hauer
Browse files

MXC: Add USB OTG (device) for i.MX31 PDK (3DS) board.



Tested on actual hardware using the g_ether and g_serial gadget drivers.

Signed-off-by: default avatarMagnus Lilja <lilja.magnus@gmail.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 3a47b1a4
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+55 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/delay.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/clk.h>
@@ -26,6 +27,7 @@
#include <linux/mfd/mc13783.h>
#include <linux/spi/spi.h>
#include <linux/regulator/machine.h>
#include <linux/fsl_devices.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -65,6 +67,21 @@ static int mx31_3ds_pins[] = {
	MX31_PIN_CSPI2_SS2__SS2, /*CS for MC13783 */
	/* MC13783 IRQ */
	IOMUX_MODE(MX31_PIN_GPIO1_3, IOMUX_CONFIG_GPIO),
	/* USB OTG reset */
	IOMUX_MODE(MX31_PIN_USB_PWR, IOMUX_CONFIG_GPIO),
	/* USB OTG */
	MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
	MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
	MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
	MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
	MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
	MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
	MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
	MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
	MX31_PIN_USBOTG_CLK__USBOTG_CLK,
	MX31_PIN_USBOTG_DIR__USBOTG_DIR,
	MX31_PIN_USBOTG_NXT__USBOTG_NXT,
	MX31_PIN_USBOTG_STP__USBOTG_STP,
};

/* Regulators */
@@ -126,6 +143,41 @@ static struct mxc_nand_platform_data imx31_3ds_nand_flash_pdata = {
#endif
};

/*
 * USB OTG
 */

#define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
		     PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)

#define USBOTG_RST_B IOMUX_TO_GPIO(MX31_PIN_USB_PWR)

static void mx31_3ds_usbotg_init(void)
{
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, USB_PAD_CFG);
	mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, USB_PAD_CFG);

	gpio_request(USBOTG_RST_B, "otgusb-reset");
	gpio_direction_output(USBOTG_RST_B, 0);
	mdelay(1);
	gpio_set_value(USBOTG_RST_B, 1);
}

static struct fsl_usb2_platform_data usbotg_pdata = {
	.operating_mode = FSL_USB2_DR_DEVICE,
	.phy_mode	= FSL_USB2_PHY_ULPI,
};

static struct imxuart_platform_data uart_pdata = {
	.flags = IMXUART_HAVE_RTSCTS,
};
@@ -315,6 +367,9 @@ static void __init mxc_board_init(void)
	spi_register_board_info(mx31_3ds_spi_devs,
						ARRAY_SIZE(mx31_3ds_spi_devs));

	mx31_3ds_usbotg_init();
	mxc_register_device(&mxc_otg_udc_device, &usbotg_pdata);

	if (!mx31_3ds_init_expio())
		platform_device_register(&smsc911x_device);
}