arch/arm/mach-mx5/board-mx51_babbage.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
  * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
  * Version 2 or later at the following locations:
  *
  * http://www.opensource.org/licenses/gpl-license.html
  * http://www.gnu.org/copyleft/gpl.html
  */

 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/fsl_devices.h>
 #include <linux/fec.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/spi/flash.h>
 #include <linux/spi/spi.h>

 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/iomux-mx51.h>
 #include <mach/mxc_ehci.h>

 #include <asm/irq.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>

 #include "devices-imx51.h"
 #include "devices.h"
 #include "cpu_op-mx51.h"

 #define BABBAGE_USB_HUB_RESET	IMX_GPIO_NR(1, 7)
 #define BABBAGE_USBH1_STP	IMX_GPIO_NR(1, 27)
 #define BABBAGE_PHY_RESET	IMX_GPIO_NR(2, 5)
 #define BABBAGE_FEC_PHY_RESET	IMX_GPIO_NR(2, 14)
 #define BABBAGE_POWER_KEY	IMX_GPIO_NR(2, 21)
 #define BABBAGE_ECSPI1_CS0	IMX_GPIO_NR(4, 24)
 #define BABBAGE_ECSPI1_CS1	IMX_GPIO_NR(4, 25)

 /* USB_CTRL_1 */
 #define MX51_USB_CTRL_1_OFFSET			0x10
 #define MX51_USB_CTRL_UH1_EXT_CLK_EN		(1 << 25)

 #define	MX51_USB_PLLDIV_12_MHZ		0x00
 #define	MX51_USB_PLL_DIV_19_2_MHZ	0x01
 #define	MX51_USB_PLL_DIV_24_MHZ	0x02

 static struct gpio_keys_button babbage_buttons[] = {
 	{
 		.gpio		= BABBAGE_POWER_KEY,
 		.code		= BTN_0,
 		.desc		= "PWR",
 		.active_low	= 1,
 		.wakeup		= 1,
 	},
 };

 static const struct gpio_keys_platform_data imx_button_data __initconst = {
 	.buttons	= babbage_buttons,
 	.nbuttons	= ARRAY_SIZE(babbage_buttons),
 };

 static iomux_v3_cfg_t mx51babbage_pads[] = {
 	/* UART1 */
 	MX51_PAD_UART1_RXD__UART1_RXD,
 	MX51_PAD_UART1_TXD__UART1_TXD,
 	MX51_PAD_UART1_RTS__UART1_RTS,
 	MX51_PAD_UART1_CTS__UART1_CTS,

 	/* UART2 */
 	MX51_PAD_UART2_RXD__UART2_RXD,
 	MX51_PAD_UART2_TXD__UART2_TXD,

 	/* UART3 */
 	MX51_PAD_EIM_D25__UART3_RXD,
 	MX51_PAD_EIM_D26__UART3_TXD,
 	MX51_PAD_EIM_D27__UART3_RTS,
 	MX51_PAD_EIM_D24__UART3_CTS,

 	/* I2C1 */
 	MX51_PAD_EIM_D16__I2C1_SDA,
 	MX51_PAD_EIM_D19__I2C1_SCL,

 	/* I2C2 */
 	MX51_PAD_KEY_COL4__I2C2_SCL,
 	MX51_PAD_KEY_COL5__I2C2_SDA,

 	/* HSI2C */
 	MX51_PAD_I2C1_CLK__HSI2C_CLK,
 	MX51_PAD_I2C1_DAT__HSI2C_DAT,

 	/* USB HOST1 */
 	MX51_PAD_USBH1_CLK__USBH1_CLK,
 	MX51_PAD_USBH1_DIR__USBH1_DIR,
 	MX51_PAD_USBH1_NXT__USBH1_NXT,
 	MX51_PAD_USBH1_DATA0__USBH1_DATA0,
 	MX51_PAD_USBH1_DATA1__USBH1_DATA1,
 	MX51_PAD_USBH1_DATA2__USBH1_DATA2,
 	MX51_PAD_USBH1_DATA3__USBH1_DATA3,
 	MX51_PAD_USBH1_DATA4__USBH1_DATA4,
 	MX51_PAD_USBH1_DATA5__USBH1_DATA5,
 	MX51_PAD_USBH1_DATA6__USBH1_DATA6,
 	MX51_PAD_USBH1_DATA7__USBH1_DATA7,

 	/* USB HUB reset line*/
 	MX51_PAD_GPIO_1_7__GPIO_1_7,

 	/* FEC */
 	MX51_PAD_EIM_EB2__FEC_MDIO,
 	MX51_PAD_EIM_EB3__FEC_RDAT1,
 	MX51_PAD_EIM_CS2__FEC_RDAT2,
 	MX51_PAD_EIM_CS3__FEC_RDAT3,
 	MX51_PAD_EIM_CS4__FEC_RX_ER,
 	MX51_PAD_EIM_CS5__FEC_CRS,
 	MX51_PAD_NANDF_RB2__FEC_COL,
 	MX51_PAD_NANDF_RB3__FEC_RXCLK,
 	MX51_PAD_NANDF_RB6__FEC_RDAT0,
 	MX51_PAD_NANDF_RB7__FEC_TDAT0,
 	MX51_PAD_NANDF_CS2__FEC_TX_ER,
 	MX51_PAD_NANDF_CS3__FEC_MDC,
 	MX51_PAD_NANDF_CS4__FEC_TDAT1,
 	MX51_PAD_NANDF_CS5__FEC_TDAT2,
 	MX51_PAD_NANDF_CS6__FEC_TDAT3,
 	MX51_PAD_NANDF_CS7__FEC_TX_EN,
 	MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK,

 	/* FEC PHY reset line */
 	MX51_PAD_EIM_A20__GPIO_2_14,

 	/* SD 1 */
 	MX51_PAD_SD1_CMD__SD1_CMD,
 	MX51_PAD_SD1_CLK__SD1_CLK,
 	MX51_PAD_SD1_DATA0__SD1_DATA0,
 	MX51_PAD_SD1_DATA1__SD1_DATA1,
 	MX51_PAD_SD1_DATA2__SD1_DATA2,
 	MX51_PAD_SD1_DATA3__SD1_DATA3,

 	/* SD 2 */
 	MX51_PAD_SD2_CMD__SD2_CMD,
 	MX51_PAD_SD2_CLK__SD2_CLK,
 	MX51_PAD_SD2_DATA0__SD2_DATA0,
 	MX51_PAD_SD2_DATA1__SD2_DATA1,
 	MX51_PAD_SD2_DATA2__SD2_DATA2,
 	MX51_PAD_SD2_DATA3__SD2_DATA3,

 	/* eCSPI1 */
 	MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
 	MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
 	MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
 	MX51_PAD_CSPI1_SS0__GPIO_4_24,
 	MX51_PAD_CSPI1_SS1__GPIO_4_25,
 };

 /* Serial ports */
 #if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
 static const struct imxuart_platform_data uart_pdata __initconst = {
 	.flags = IMXUART_HAVE_RTSCTS,
 };

 static inline void mxc_init_imx_uart(void)
 {
 	imx51_add_imx_uart(0, &uart_pdata);
 	imx51_add_imx_uart(1, &uart_pdata);
 	imx51_add_imx_uart(2, &uart_pdata);
 }
 #else /* !SERIAL_IMX */
 static inline void mxc_init_imx_uart(void)
 {
 }
 #endif /* SERIAL_IMX */

 static const struct imxi2c_platform_data babbage_i2c_data __initconst = {
 	.bitrate = 100000,
 };

 static struct imxi2c_platform_data babbage_hsi2c_data = {
 	.bitrate = 400000,
 };

 static int gpio_usbh1_active(void)
 {
 	iomux_v3_cfg_t usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27;
 	iomux_v3_cfg_t phyreset_gpio = MX51_PAD_EIM_D21__GPIO_2_5;
 	int ret;

 	/* Set USBH1_STP to GPIO and toggle it */
 	mxc_iomux_v3_setup_pad(&usbh1stp_gpio);
 	ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");

 	if (ret) {
 		pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
 		return ret;
 	}
 	gpio_direction_output(BABBAGE_USBH1_STP, 0);
 	gpio_set_value(BABBAGE_USBH1_STP, 1);
 	msleep(100);
 	gpio_free(BABBAGE_USBH1_STP);

 	/* De-assert USB PHY RESETB */
 	mxc_iomux_v3_setup_pad(&phyreset_gpio);
 	ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");

 	if (ret) {
 		pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
 		return ret;
 	}
 	gpio_direction_output(BABBAGE_PHY_RESET, 1);
 	return 0;
 }

 static inline void babbage_usbhub_reset(void)
 {
 	int ret;

 	/* Bring USB hub out of reset */
 	ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
 	if (ret) {
 		printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
 		return;
 	}
 	gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);

 	/* USB HUB RESET - De-assert USB HUB RESET_N */
 	msleep(1);
 	gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
 	msleep(1);
 	gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
 }

 static inline void babbage_fec_reset(void)
 {
 	int ret;

 	/* reset FEC PHY */
 	ret = gpio_request(BABBAGE_FEC_PHY_RESET, "fec-phy-reset");
 	if (ret) {
 		printk(KERN_ERR"failed to get GPIO_FEC_PHY_RESET: %d\n", ret);
 		return;
 	}
 	gpio_direction_output(BABBAGE_FEC_PHY_RESET, 0);
 	gpio_set_value(BABBAGE_FEC_PHY_RESET, 0);
 	msleep(1);
 	gpio_set_value(BABBAGE_FEC_PHY_RESET, 1);
 }

 /* This function is board specific as the bit mask for the plldiv will also
 be different for other Freescale SoCs, thus a common bitmask is not
 possible and cannot get place in /plat-mxc/ehci.c.*/
 static int initialize_otg_port(struct platform_device *pdev)
 {
 	u32 v;
 	void __iomem *usb_base;
 	void __iomem *usbother_base;

 	usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
 	usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;

 	/* Set the PHY clock to 19.2MHz */
 	v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 	v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
 	v |= MX51_USB_PLL_DIV_19_2_MHZ;
 	__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
 	iounmap(usb_base);
 	return 0;
 }

 static int initialize_usbh1_port(struct platform_device *pdev)
 {
 	u32 v;
 	void __iomem *usb_base;
 	void __iomem *usbother_base;

 	usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
 	usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;

 	/* The clock for the USBH1 ULPI port will come externally from the PHY. */
 	v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
 	__raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
 	iounmap(usb_base);
 	return 0;
 }

 static struct mxc_usbh_platform_data dr_utmi_config = {
 	.init		= initialize_otg_port,
 	.portsc	= MXC_EHCI_UTMI_16BIT,
 	.flags	= MXC_EHCI_INTERNAL_PHY,
 };

 static struct fsl_usb2_platform_data usb_pdata = {
 	.operating_mode	= FSL_USB2_DR_DEVICE,
 	.phy_mode	= FSL_USB2_PHY_UTMI_WIDE,
 };

 static struct mxc_usbh_platform_data usbh1_config = {
 	.init		= initialize_usbh1_port,
 	.portsc	= MXC_EHCI_MODE_ULPI,
 	.flags	= (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),
 };

 static int otg_mode_host;

 static int __init babbage_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=", babbage_otg_mode);

 static struct spi_board_info mx51_babbage_spi_board_info[] __initdata = {
 	{
 		.modalias = "mtd_dataflash",
 		.max_speed_hz = 25000000,
 		.bus_num = 0,
 		.chip_select = 1,
 		.mode = SPI_MODE_0,
 		.platform_data = NULL,
 	},
 };

 static int mx51_babbage_spi_cs[] = {
 	BABBAGE_ECSPI1_CS0,
 	BABBAGE_ECSPI1_CS1,
 };

 static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
 	.chipselect     = mx51_babbage_spi_cs,
 	.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
 };

 /*
  * Board specific initialization.
  */
 static void __init mxc_board_init(void)
 {
 	iomux_v3_cfg_t usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
 	iomux_v3_cfg_t power_key = MX51_PAD_EIM_A27__GPIO_2_21;

 #if defined(CONFIG_CPU_FREQ_IMX)
 	get_cpu_op = mx51_get_cpu_op;
 #endif
 	mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
 					ARRAY_SIZE(mx51babbage_pads));
 	mxc_init_imx_uart();
 	babbage_fec_reset();
 	imx51_add_fec(NULL);

 	/* Set the PAD settings for the pwr key. */
 	power_key.pad_ctrl = MX51_GPIO_PAD_CTRL_2;
 	mxc_iomux_v3_setup_pad(&power_key);
 	imx51_add_gpio_keys(&imx_button_data);

 	imx51_add_imx_i2c(0, &babbage_i2c_data);
 	imx51_add_imx_i2c(1, &babbage_i2c_data);
 	mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);

 	if (otg_mode_host)
 		mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
 	else {
 		initialize_otg_port(NULL);
 		mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
 	}

 	gpio_usbh1_active();
 	mxc_register_device(&mxc_usbh1_device, &usbh1_config);
 	/* setback USBH1_STP to be function */
 	mxc_iomux_v3_setup_pad(&usbh1stp);
 	babbage_usbhub_reset();

 	imx51_add_sdhci_esdhc_imx(0, NULL);
 	imx51_add_sdhci_esdhc_imx(1, NULL);

 	spi_register_board_info(mx51_babbage_spi_board_info,
 		ARRAY_SIZE(mx51_babbage_spi_board_info));
 	imx51_add_ecspi(0, &mx51_babbage_spi_pdata);
 }

 static void __init mx51_babbage_timer_init(void)
 {
 	mx51_clocks_init(32768, 24000000, 22579200, 0);
 }

 static struct sys_timer mxc_timer = {
 	.init	= mx51_babbage_timer_init,
 };

 MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
 	/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
 	.boot_params = MX51_PHYS_OFFSET + 0x100,
 	.map_io = mx51_map_io,
 	.init_irq = mx51_init_irq,
 	.init_machine = mxc_board_init,
 	.timer = &mxc_timer,
 MACHINE_END
	/*
	* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
	* Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
	*
	* The code contained herein is licensed under the GNU General Public
	* License. You may obtain a copy of the GNU General Public License
	* Version 2 or later at the following locations:
	*
	* http://www.opensource.org/licenses/gpl-license.html
	* http://www.gnu.org/copyleft/gpl.html
	*/

	#include <linux/init.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>
	#include <linux/gpio.h>
	#include <linux/delay.h>
	#include <linux/io.h>
	#include <linux/fsl_devices.h>
	#include <linux/fec.h>
	#include <linux/gpio_keys.h>
	#include <linux/input.h>
	#include <linux/spi/flash.h>
	#include <linux/spi/spi.h>

	#include <mach/common.h>
	#include <mach/hardware.h>
	#include <mach/iomux-mx51.h>
	#include <mach/mxc_ehci.h>

	#include <asm/irq.h>
	#include <asm/setup.h>
	#include <asm/mach-types.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/time.h>

	#include "devices-imx51.h"
	#include "devices.h"
	#include "cpu_op-mx51.h"

	#define BABBAGE_USB_HUB_RESET IMX_GPIO_NR(1, 7)
	#define BABBAGE_USBH1_STP IMX_GPIO_NR(1, 27)
	#define BABBAGE_PHY_RESET IMX_GPIO_NR(2, 5)
	#define BABBAGE_FEC_PHY_RESET IMX_GPIO_NR(2, 14)
	#define BABBAGE_POWER_KEY IMX_GPIO_NR(2, 21)
	#define BABBAGE_ECSPI1_CS0 IMX_GPIO_NR(4, 24)
	#define BABBAGE_ECSPI1_CS1 IMX_GPIO_NR(4, 25)

	/* USB_CTRL_1 */
	#define MX51_USB_CTRL_1_OFFSET 0x10
	#define MX51_USB_CTRL_UH1_EXT_CLK_EN (1 << 25)

	#define MX51_USB_PLLDIV_12_MHZ 0x00
	#define MX51_USB_PLL_DIV_19_2_MHZ 0x01
	#define MX51_USB_PLL_DIV_24_MHZ 0x02

	static struct gpio_keys_button babbage_buttons[] = {
	{
	.gpio = BABBAGE_POWER_KEY,
	.code = BTN_0,
	.desc = "PWR",
	.active_low = 1,
	.wakeup = 1,
	},
	};

	static const struct gpio_keys_platform_data imx_button_data __initconst = {
	.buttons = babbage_buttons,
	.nbuttons = ARRAY_SIZE(babbage_buttons),
	};

	static iomux_v3_cfg_t mx51babbage_pads[] = {
	/* UART1 */
	MX51_PAD_UART1_RXD__UART1_RXD,
	MX51_PAD_UART1_TXD__UART1_TXD,
	MX51_PAD_UART1_RTS__UART1_RTS,
	MX51_PAD_UART1_CTS__UART1_CTS,

	/* UART2 */
	MX51_PAD_UART2_RXD__UART2_RXD,
	MX51_PAD_UART2_TXD__UART2_TXD,

	/* UART3 */
	MX51_PAD_EIM_D25__UART3_RXD,
	MX51_PAD_EIM_D26__UART3_TXD,
	MX51_PAD_EIM_D27__UART3_RTS,
	MX51_PAD_EIM_D24__UART3_CTS,

	/* I2C1 */
	MX51_PAD_EIM_D16__I2C1_SDA,
	MX51_PAD_EIM_D19__I2C1_SCL,

	/* I2C2 */
	MX51_PAD_KEY_COL4__I2C2_SCL,
	MX51_PAD_KEY_COL5__I2C2_SDA,

	/* HSI2C */
	MX51_PAD_I2C1_CLK__HSI2C_CLK,
	MX51_PAD_I2C1_DAT__HSI2C_DAT,

	/* USB HOST1 */
	MX51_PAD_USBH1_CLK__USBH1_CLK,
	MX51_PAD_USBH1_DIR__USBH1_DIR,
	MX51_PAD_USBH1_NXT__USBH1_NXT,
	MX51_PAD_USBH1_DATA0__USBH1_DATA0,
	MX51_PAD_USBH1_DATA1__USBH1_DATA1,
	MX51_PAD_USBH1_DATA2__USBH1_DATA2,
	MX51_PAD_USBH1_DATA3__USBH1_DATA3,
	MX51_PAD_USBH1_DATA4__USBH1_DATA4,
	MX51_PAD_USBH1_DATA5__USBH1_DATA5,
	MX51_PAD_USBH1_DATA6__USBH1_DATA6,
	MX51_PAD_USBH1_DATA7__USBH1_DATA7,

	/* USB HUB reset line*/
	MX51_PAD_GPIO_1_7__GPIO_1_7,

	/* FEC */
	MX51_PAD_EIM_EB2__FEC_MDIO,
	MX51_PAD_EIM_EB3__FEC_RDAT1,
	MX51_PAD_EIM_CS2__FEC_RDAT2,
	MX51_PAD_EIM_CS3__FEC_RDAT3,
	MX51_PAD_EIM_CS4__FEC_RX_ER,
	MX51_PAD_EIM_CS5__FEC_CRS,
	MX51_PAD_NANDF_RB2__FEC_COL,
	MX51_PAD_NANDF_RB3__FEC_RXCLK,
	MX51_PAD_NANDF_RB6__FEC_RDAT0,
	MX51_PAD_NANDF_RB7__FEC_TDAT0,
	MX51_PAD_NANDF_CS2__FEC_TX_ER,
	MX51_PAD_NANDF_CS3__FEC_MDC,
	MX51_PAD_NANDF_CS4__FEC_TDAT1,
	MX51_PAD_NANDF_CS5__FEC_TDAT2,
	MX51_PAD_NANDF_CS6__FEC_TDAT3,
	MX51_PAD_NANDF_CS7__FEC_TX_EN,
	MX51_PAD_NANDF_RDY_INT__FEC_TX_CLK,

	/* FEC PHY reset line */
	MX51_PAD_EIM_A20__GPIO_2_14,

	/* SD 1 */
	MX51_PAD_SD1_CMD__SD1_CMD,
	MX51_PAD_SD1_CLK__SD1_CLK,
	MX51_PAD_SD1_DATA0__SD1_DATA0,
	MX51_PAD_SD1_DATA1__SD1_DATA1,
	MX51_PAD_SD1_DATA2__SD1_DATA2,
	MX51_PAD_SD1_DATA3__SD1_DATA3,

	/* SD 2 */
	MX51_PAD_SD2_CMD__SD2_CMD,
	MX51_PAD_SD2_CLK__SD2_CLK,
	MX51_PAD_SD2_DATA0__SD2_DATA0,
	MX51_PAD_SD2_DATA1__SD2_DATA1,
	MX51_PAD_SD2_DATA2__SD2_DATA2,
	MX51_PAD_SD2_DATA3__SD2_DATA3,

	/* eCSPI1 */
	MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
	MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
	MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
	MX51_PAD_CSPI1_SS0__GPIO_4_24,
	MX51_PAD_CSPI1_SS1__GPIO_4_25,
	};

	/* Serial ports */
	#if defined(CONFIG_SERIAL_IMX) \|\| defined(CONFIG_SERIAL_IMX_MODULE)
	static const struct imxuart_platform_data uart_pdata __initconst = {
	.flags = IMXUART_HAVE_RTSCTS,
	};

	static inline void mxc_init_imx_uart(void)
	{
	imx51_add_imx_uart(0, &uart_pdata);
	imx51_add_imx_uart(1, &uart_pdata);
	imx51_add_imx_uart(2, &uart_pdata);
	}
	#else /* !SERIAL_IMX */
	static inline void mxc_init_imx_uart(void)
	{
	}
	#endif /* SERIAL_IMX */

	static const struct imxi2c_platform_data babbage_i2c_data __initconst = {
	.bitrate = 100000,
	};

	static struct imxi2c_platform_data babbage_hsi2c_data = {
	.bitrate = 400000,
	};

	static int gpio_usbh1_active(void)
	{
	iomux_v3_cfg_t usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27;
	iomux_v3_cfg_t phyreset_gpio = MX51_PAD_EIM_D21__GPIO_2_5;
	int ret;

	/* Set USBH1_STP to GPIO and toggle it */
	mxc_iomux_v3_setup_pad(&usbh1stp_gpio);
	ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");

	if (ret) {
	pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
	return ret;
	}
	gpio_direction_output(BABBAGE_USBH1_STP, 0);
	gpio_set_value(BABBAGE_USBH1_STP, 1);
	msleep(100);
	gpio_free(BABBAGE_USBH1_STP);

	/* De-assert USB PHY RESETB */
	mxc_iomux_v3_setup_pad(&phyreset_gpio);
	ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");

	if (ret) {
	pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
	return ret;
	}
	gpio_direction_output(BABBAGE_PHY_RESET, 1);
	return 0;
	}

	static inline void babbage_usbhub_reset(void)
	{
	int ret;

	/* Bring USB hub out of reset */
	ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
	if (ret) {
	printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
	return;
	}
	gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);

	/* USB HUB RESET - De-assert USB HUB RESET_N */
	msleep(1);
	gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
	msleep(1);
	gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
	}

	static inline void babbage_fec_reset(void)
	{
	int ret;

	/* reset FEC PHY */
	ret = gpio_request(BABBAGE_FEC_PHY_RESET, "fec-phy-reset");
	if (ret) {
	printk(KERN_ERR"failed to get GPIO_FEC_PHY_RESET: %d\n", ret);
	return;
	}
	gpio_direction_output(BABBAGE_FEC_PHY_RESET, 0);
	gpio_set_value(BABBAGE_FEC_PHY_RESET, 0);
	msleep(1);
	gpio_set_value(BABBAGE_FEC_PHY_RESET, 1);
	}

	/* This function is board specific as the bit mask for the plldiv will also
	be different for other Freescale SoCs, thus a common bitmask is not
	possible and cannot get place in /plat-mxc/ehci.c.*/
	static int initialize_otg_port(struct platform_device *pdev)
	{
	u32 v;
	void __iomem *usb_base;
	void __iomem *usbother_base;

	usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
	usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;

	/* Set the PHY clock to 19.2MHz */
	v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
	v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
	v \|= MX51_USB_PLL_DIV_19_2_MHZ;
	__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
	iounmap(usb_base);
	return 0;
	}

	static int initialize_usbh1_port(struct platform_device *pdev)
	{
	u32 v;
	void __iomem *usb_base;
	void __iomem *usbother_base;

	usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
	usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;

	/* The clock for the USBH1 ULPI port will come externally from the PHY. */
	v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
	__raw_writel(v \| MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
	iounmap(usb_base);
	return 0;
	}

	static struct mxc_usbh_platform_data dr_utmi_config = {
	.init = initialize_otg_port,
	.portsc = MXC_EHCI_UTMI_16BIT,
	.flags = MXC_EHCI_INTERNAL_PHY,
	};

	static struct fsl_usb2_platform_data usb_pdata = {
	.operating_mode = FSL_USB2_DR_DEVICE,
	.phy_mode = FSL_USB2_PHY_UTMI_WIDE,
	};

	static struct mxc_usbh_platform_data usbh1_config = {
	.init = initialize_usbh1_port,
	.portsc = MXC_EHCI_MODE_ULPI,
	.flags = (MXC_EHCI_POWER_PINS_ENABLED \| MXC_EHCI_ITC_NO_THRESHOLD),
	};

	static int otg_mode_host;

	static int __init babbage_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=", babbage_otg_mode);

	static struct spi_board_info mx51_babbage_spi_board_info[] __initdata = {
	{
	.modalias = "mtd_dataflash",
	.max_speed_hz = 25000000,
	.bus_num = 0,
	.chip_select = 1,
	.mode = SPI_MODE_0,
	.platform_data = NULL,
	},
	};

	static int mx51_babbage_spi_cs[] = {
	BABBAGE_ECSPI1_CS0,
	BABBAGE_ECSPI1_CS1,
	};

	static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
	.chipselect = mx51_babbage_spi_cs,
	.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
	};

	/*
	* Board specific initialization.
	*/
	static void __init mxc_board_init(void)
	{
	iomux_v3_cfg_t usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
	iomux_v3_cfg_t power_key = MX51_PAD_EIM_A27__GPIO_2_21;

	#if defined(CONFIG_CPU_FREQ_IMX)
	get_cpu_op = mx51_get_cpu_op;
	#endif
	mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
	ARRAY_SIZE(mx51babbage_pads));
	mxc_init_imx_uart();
	babbage_fec_reset();
	imx51_add_fec(NULL);

	/* Set the PAD settings for the pwr key. */
	power_key.pad_ctrl = MX51_GPIO_PAD_CTRL_2;
	mxc_iomux_v3_setup_pad(&power_key);
	imx51_add_gpio_keys(&imx_button_data);

	imx51_add_imx_i2c(0, &babbage_i2c_data);
	imx51_add_imx_i2c(1, &babbage_i2c_data);
	mxc_register_device(&mxc_hsi2c_device, &babbage_hsi2c_data);

	if (otg_mode_host)
	mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
	else {
	initialize_otg_port(NULL);
	mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
	}

	gpio_usbh1_active();
	mxc_register_device(&mxc_usbh1_device, &usbh1_config);
	/* setback USBH1_STP to be function */
	mxc_iomux_v3_setup_pad(&usbh1stp);
	babbage_usbhub_reset();

	imx51_add_sdhci_esdhc_imx(0, NULL);
	imx51_add_sdhci_esdhc_imx(1, NULL);

	spi_register_board_info(mx51_babbage_spi_board_info,
	ARRAY_SIZE(mx51_babbage_spi_board_info));
	imx51_add_ecspi(0, &mx51_babbage_spi_pdata);
	}

	static void __init mx51_babbage_timer_init(void)
	{
	mx51_clocks_init(32768, 24000000, 22579200, 0);
	}

	static struct sys_timer mxc_timer = {
	.init = mx51_babbage_timer_init,
	};

	MACHINE_START(MX51_BABBAGE, "Freescale MX51 Babbage Board")
	/* Maintainer: Amit Kucheria <amit.kucheria@canonical.com> */
	.boot_params = MX51_PHYS_OFFSET + 0x100,
	.map_io = mx51_map_io,
	.init_irq = mx51_init_irq,
	.init_machine = mxc_board_init,
	.timer = &mxc_timer,
	MACHINE_END