USB: pxa: Add USB client support for Marvell PXA9xx/PXA168 chips

This patch add USB client support Marvell PXA9xx/PXA168 chips. The USB
controller in PXA9xx/PXA168 is a High-Speed OTG controller. The available
endpoints is different between PXA9xx and PXA168.

NOTE:
It is the first version of Marvell PXA9xx/PXA168 USB controller driver.
The support for OTG mode will be added in later patch.
PXA9xx and PXA168 has integrated UTMI PHY in the chips. The initialization
for the PHY is a little different between PXA9xx and PXA168.
Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/Kconfig

@@ -338,6 +338,19 @@ config USB_S3C2410_DEBUG
 	boolean "S3C2410 udc debug messages"
 	depends on USB_GADGET_S3C2410
 
+config USB_GADGET_PXA_U2O
+	boolean "PXA9xx Processor USB2.0 controller"
+	select USB_GADGET_DUALSPEED
+	help
+	  PXA9xx Processor series include a high speed USB2.0 device
+	  controller, which support high speed and full speed USB peripheral.
+
+config USB_PXA_U2O
+	tristate
+	depends on USB_GADGET_PXA_U2O
+	default USB_GADGET
+	select USB_GADGET_SELECTED
+
 #
 # Controllers available in both integrated and discrete versions
 #

drivers/usb/gadget/Makefile

@@ -25,6 +25,8 @@ obj-$(CONFIG_USB_CI13XXX)	+= ci13xxx_udc.o
 obj-$(CONFIG_USB_S3C_HSOTG)	+= s3c-hsotg.o
 obj-$(CONFIG_USB_LANGWELL)	+= langwell_udc.o
 obj-$(CONFIG_USB_EG20T)		+= pch_udc.o
+obj-$(CONFIG_USB_PXA_U2O)	+= mv_udc.o
+mv_udc-y			:= mv_udc_core.o mv_udc_phy.o
 
 #
 # USB gadget drivers

drivers/usb/gadget/mv_udc.h

+
+#ifndef __MV_UDC_H
+#define __MV_UDC_H
+
+#define VUSBHS_MAX_PORTS	8
+
+#define DQH_ALIGNMENT		2048
+#define DTD_ALIGNMENT		64
+#define DMA_BOUNDARY		4096
+
+#define EP_DIR_IN	1
+#define EP_DIR_OUT	0
+
+#define DMA_ADDR_INVALID	(~(dma_addr_t)0)
+
+#define EP0_MAX_PKT_SIZE	64
+/* ep0 transfer state */
+#define WAIT_FOR_SETUP		0
+#define DATA_STATE_XMIT		1
+#define DATA_STATE_NEED_ZLP	2
+#define WAIT_FOR_OUT_STATUS	3
+#define DATA_STATE_RECV		4
+
+#define CAPLENGTH_MASK		(0xff)
+#define DCCPARAMS_DEN_MASK	(0x1f)
+
+#define HCSPARAMS_PPC		(0x10)
+
+/* Frame Index Register Bit Masks */
+#define USB_FRINDEX_MASKS	0x3fff
+
+/* Command Register Bit Masks */
+#define USBCMD_RUN_STOP				(0x00000001)
+#define USBCMD_CTRL_RESET			(0x00000002)
+#define USBCMD_SETUP_TRIPWIRE_SET		(0x00002000)
+#define USBCMD_SETUP_TRIPWIRE_CLEAR		(~USBCMD_SETUP_TRIPWIRE_SET)
+
+#define USBCMD_ATDTW_TRIPWIRE_SET		(0x00004000)
+#define USBCMD_ATDTW_TRIPWIRE_CLEAR		(~USBCMD_ATDTW_TRIPWIRE_SET)
+
+/* bit 15,3,2 are for frame list size */
+#define USBCMD_FRAME_SIZE_1024			(0x00000000) /* 000 */
+#define USBCMD_FRAME_SIZE_512			(0x00000004) /* 001 */
+#define USBCMD_FRAME_SIZE_256			(0x00000008) /* 010 */
+#define USBCMD_FRAME_SIZE_128			(0x0000000C) /* 011 */
+#define USBCMD_FRAME_SIZE_64			(0x00008000) /* 100 */
+#define USBCMD_FRAME_SIZE_32			(0x00008004) /* 101 */
+#define USBCMD_FRAME_SIZE_16			(0x00008008) /* 110 */
+#define USBCMD_FRAME_SIZE_8			(0x0000800C) /* 111 */
+
+#define EPCTRL_TX_ALL_MASK			(0xFFFF0000)
+#define EPCTRL_RX_ALL_MASK			(0x0000FFFF)
+
+#define EPCTRL_TX_DATA_TOGGLE_RST		(0x00400000)
+#define EPCTRL_TX_EP_STALL			(0x00010000)
+#define EPCTRL_RX_EP_STALL			(0x00000001)
+#define EPCTRL_RX_DATA_TOGGLE_RST		(0x00000040)
+#define EPCTRL_RX_ENABLE			(0x00000080)
+#define EPCTRL_TX_ENABLE			(0x00800000)
+#define EPCTRL_CONTROL				(0x00000000)
+#define EPCTRL_ISOCHRONOUS			(0x00040000)
+#define EPCTRL_BULK				(0x00080000)
+#define EPCTRL_INT				(0x000C0000)
+#define EPCTRL_TX_TYPE				(0x000C0000)
+#define EPCTRL_RX_TYPE				(0x0000000C)
+#define EPCTRL_DATA_TOGGLE_INHIBIT		(0x00000020)
+#define EPCTRL_TX_EP_TYPE_SHIFT			(18)
+#define EPCTRL_RX_EP_TYPE_SHIFT			(2)
+
+#define EPCOMPLETE_MAX_ENDPOINTS		(16)
+
+/* endpoint list address bit masks */
+#define USB_EP_LIST_ADDRESS_MASK              0xfffff800
+
+#define PORTSCX_W1C_BITS			0x2a
+#define PORTSCX_PORT_RESET			0x00000100
+#define PORTSCX_PORT_POWER			0x00001000
+#define PORTSCX_FORCE_FULL_SPEED_CONNECT	0x01000000
+#define PORTSCX_PAR_XCVR_SELECT			0xC0000000
+#define PORTSCX_PORT_FORCE_RESUME		0x00000040
+#define PORTSCX_PORT_SUSPEND			0x00000080
+#define PORTSCX_PORT_SPEED_FULL			0x00000000
+#define PORTSCX_PORT_SPEED_LOW			0x04000000
+#define PORTSCX_PORT_SPEED_HIGH			0x08000000
+#define PORTSCX_PORT_SPEED_MASK			0x0C000000
+
+/* USB MODE Register Bit Masks */
+#define USBMODE_CTRL_MODE_IDLE			0x00000000
+#define USBMODE_CTRL_MODE_DEVICE		0x00000002
+#define USBMODE_CTRL_MODE_HOST			0x00000003
+#define USBMODE_CTRL_MODE_RSV			0x00000001
+#define USBMODE_SETUP_LOCK_OFF			0x00000008
+#define USBMODE_STREAM_DISABLE			0x00000010
+
+/* USB STS Register Bit Masks */
+#define USBSTS_INT			0x00000001
+#define USBSTS_ERR			0x00000002
+#define USBSTS_PORT_CHANGE		0x00000004
+#define USBSTS_FRM_LST_ROLL		0x00000008
+#define USBSTS_SYS_ERR			0x00000010
+#define USBSTS_IAA			0x00000020
+#define USBSTS_RESET			0x00000040
+#define USBSTS_SOF			0x00000080
+#define USBSTS_SUSPEND			0x00000100
+#define USBSTS_HC_HALTED		0x00001000
+#define USBSTS_RCL			0x00002000
+#define USBSTS_PERIODIC_SCHEDULE	0x00004000
+#define USBSTS_ASYNC_SCHEDULE		0x00008000
+
+
+/* Interrupt Enable Register Bit Masks */
+#define USBINTR_INT_EN                          (0x00000001)
+#define USBINTR_ERR_INT_EN                      (0x00000002)
+#define USBINTR_PORT_CHANGE_DETECT_EN           (0x00000004)
+
+#define USBINTR_ASYNC_ADV_AAE                   (0x00000020)
+#define USBINTR_ASYNC_ADV_AAE_ENABLE            (0x00000020)
+#define USBINTR_ASYNC_ADV_AAE_DISABLE           (0xFFFFFFDF)
+
+#define USBINTR_RESET_EN                        (0x00000040)
+#define USBINTR_SOF_UFRAME_EN                   (0x00000080)
+#define USBINTR_DEVICE_SUSPEND                  (0x00000100)
+
+#define USB_DEVICE_ADDRESS_MASK			(0xfe000000)
+#define USB_DEVICE_ADDRESS_BIT_SHIFT		(25)
+
+struct mv_cap_regs {
+	u32	caplength_hciversion;
+	u32	hcsparams;	/* HC structural parameters */
+	u32	hccparams;	/* HC Capability Parameters*/
+	u32	reserved[5];
+	u32	dciversion;	/* DC version number and reserved 16 bits */
+	u32	dccparams;	/* DC Capability Parameters */
+};
+
+struct mv_op_regs {
+	u32	usbcmd;		/* Command register */
+	u32	usbsts;		/* Status register */
+	u32	usbintr;	/* Interrupt enable */
+	u32	frindex;	/* Frame index */
+	u32	reserved1[1];
+	u32	deviceaddr;	/* Device Address */
+	u32	eplistaddr;	/* Endpoint List Address */
+	u32	ttctrl;		/* HOST TT status and control */
+	u32	burstsize;	/* Programmable Burst Size */
+	u32	txfilltuning;	/* Host Transmit Pre-Buffer Packet Tuning */
+	u32	reserved[4];
+	u32	epnak;		/* Endpoint NAK */
+	u32	epnaken;	/* Endpoint NAK Enable */
+	u32	configflag;	/* Configured Flag register */
+	u32	portsc[VUSBHS_MAX_PORTS]; /* Port Status/Control x, x = 1..8 */
+	u32	otgsc;
+	u32	usbmode;	/* USB Host/Device mode */
+	u32	epsetupstat;	/* Endpoint Setup Status */
+	u32	epprime;	/* Endpoint Initialize */
+	u32	epflush;	/* Endpoint De-initialize */
+	u32	epstatus;	/* Endpoint Status */
+	u32	epcomplete;	/* Endpoint Interrupt On Complete */
+	u32	epctrlx[16];	/* Endpoint Control, where x = 0.. 15 */
+	u32	mcr;		/* Mux Control */
+	u32	isr;		/* Interrupt Status */
+	u32	ier;		/* Interrupt Enable */
+};
+
+struct mv_udc {
+	struct usb_gadget		gadget;
+	struct usb_gadget_driver	*driver;
+	spinlock_t			lock;
+	struct completion		*done;
+	struct platform_device		*dev;
+	int				irq;
+
+	struct mv_cap_regs __iomem	*cap_regs;
+	struct mv_op_regs __iomem	*op_regs;
+	unsigned int			phy_regs;
+	unsigned int			max_eps;
+	struct mv_dqh			*ep_dqh;
+	size_t				ep_dqh_size;
+	dma_addr_t			ep_dqh_dma;
+
+	struct dma_pool			*dtd_pool;
+	struct mv_ep			*eps;
+
+	struct mv_dtd			*dtd_head;
+	struct mv_dtd			*dtd_tail;
+	unsigned int			dtd_entries;
+
+	struct mv_req			*status_req;
+	struct usb_ctrlrequest		local_setup_buff;
+
+	unsigned int		resume_state;	/* USB state to resume */
+	unsigned int		usb_state;	/* USB current state */
+	unsigned int		ep0_state;	/* Endpoint zero state */
+	unsigned int		ep0_dir;
+
+	unsigned int		dev_addr;
+
+	int			errors;
+	unsigned		softconnect:1,
+				vbus_active:1,
+				remote_wakeup:1,
+				softconnected:1,
+				force_fs:1;
+	struct clk		*clk;
+};
+
+/* endpoint data structure */
+struct mv_ep {
+	struct usb_ep		ep;
+	struct mv_udc		*udc;
+	struct list_head	queue;
+	struct mv_dqh		*dqh;
+	const struct usb_endpoint_descriptor	*desc;
+	u32			direction;
+	char			name[14];
+	unsigned		stopped:1,
+				wedge:1,
+				ep_type:2,
+				ep_num:8;
+};
+
+/* request data structure */
+struct mv_req {
+	struct usb_request	req;
+	struct mv_dtd		*dtd, *head, *tail;
+	struct mv_ep		*ep;
+	struct list_head	queue;
+	unsigned		dtd_count;
+	unsigned		mapped:1;
+};
+
+#define EP_QUEUE_HEAD_MULT_POS			30
+#define EP_QUEUE_HEAD_ZLT_SEL			0x20000000
+#define EP_QUEUE_HEAD_MAX_PKT_LEN_POS		16
+#define EP_QUEUE_HEAD_MAX_PKT_LEN(ep_info)	(((ep_info)>>16)&0x07ff)
+#define EP_QUEUE_HEAD_IOS			0x00008000
+#define EP_QUEUE_HEAD_NEXT_TERMINATE		0x00000001
+#define EP_QUEUE_HEAD_IOC			0x00008000
+#define EP_QUEUE_HEAD_MULTO			0x00000C00
+#define EP_QUEUE_HEAD_STATUS_HALT		0x00000040
+#define EP_QUEUE_HEAD_STATUS_ACTIVE		0x00000080
+#define EP_QUEUE_CURRENT_OFFSET_MASK		0x00000FFF
+#define EP_QUEUE_HEAD_NEXT_POINTER_MASK		0xFFFFFFE0
+#define EP_QUEUE_FRINDEX_MASK			0x000007FF
+#define EP_MAX_LENGTH_TRANSFER			0x4000
+
+struct mv_dqh {
+	/* Bits 16..26 Bit 15 is Interrupt On Setup */
+	u32	max_packet_length;
+	u32	curr_dtd_ptr;		/* Current dTD Pointer */
+	u32	next_dtd_ptr;		/* Next dTD Pointer */
+	/* Total bytes (16..30), IOC (15), INT (8), STS (0-7) */
+	u32	size_ioc_int_sts;
+	u32	buff_ptr0;		/* Buffer pointer Page 0 (12-31) */
+	u32	buff_ptr1;		/* Buffer pointer Page 1 (12-31) */
+	u32	buff_ptr2;		/* Buffer pointer Page 2 (12-31) */
+	u32	buff_ptr3;		/* Buffer pointer Page 3 (12-31) */
+	u32	buff_ptr4;		/* Buffer pointer Page 4 (12-31) */
+	u32	reserved1;
+	/* 8 bytes of setup data that follows the Setup PID */
+	u8	setup_buffer[8];
+	u32	reserved2[4];
+};
+
+
+#define DTD_NEXT_TERMINATE		(0x00000001)
+#define DTD_IOC				(0x00008000)
+#define DTD_STATUS_ACTIVE		(0x00000080)
+#define DTD_STATUS_HALTED		(0x00000040)
+#define DTD_STATUS_DATA_BUFF_ERR	(0x00000020)
+#define DTD_STATUS_TRANSACTION_ERR	(0x00000008)
+#define DTD_RESERVED_FIELDS		(0x00007F00)
+#define DTD_ERROR_MASK			(0x68)
+#define DTD_ADDR_MASK			(0xFFFFFFE0)
+#define DTD_PACKET_SIZE			0x7FFF0000
+#define DTD_LENGTH_BIT_POS		(16)
+
+struct mv_dtd {
+	u32	dtd_next;
+	u32	size_ioc_sts;
+	u32	buff_ptr0;		/* Buffer pointer Page 0 */
+	u32	buff_ptr1;		/* Buffer pointer Page 1 */
+	u32	buff_ptr2;		/* Buffer pointer Page 2 */
+	u32	buff_ptr3;		/* Buffer pointer Page 3 */
+	u32	buff_ptr4;		/* Buffer pointer Page 4 */
+	u32	scratch_ptr;
+	/* 32 bytes */
+	dma_addr_t td_dma;		/* dma address for this td */
+	struct mv_dtd *next_dtd_virt;
+};
+
+extern int mv_udc_phy_init(unsigned int base);
+
+#endif

drivers/usb/gadget/mv_udc_phy.c

+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+
+#include <mach/cputype.h>
+
+#ifdef CONFIG_ARCH_MMP
+
+#define UTMI_REVISION		0x0
+#define UTMI_CTRL		0x4
+#define UTMI_PLL		0x8
+#define UTMI_TX			0xc
+#define UTMI_RX			0x10
+#define UTMI_IVREF		0x14
+#define UTMI_T0			0x18
+#define UTMI_T1			0x1c
+#define UTMI_T2			0x20
+#define UTMI_T3			0x24
+#define UTMI_T4			0x28
+#define UTMI_T5			0x2c
+#define UTMI_RESERVE		0x30
+#define UTMI_USB_INT		0x34
+#define UTMI_DBG_CTL		0x38
+#define UTMI_OTG_ADDON		0x3c
+
+/* For UTMICTRL Register */
+#define UTMI_CTRL_USB_CLK_EN			(1 << 31)
+/* pxa168 */
+#define UTMI_CTRL_SUSPEND_SET1			(1 << 30)
+#define UTMI_CTRL_SUSPEND_SET2			(1 << 29)
+#define UTMI_CTRL_RXBUF_PDWN			(1 << 24)
+#define UTMI_CTRL_TXBUF_PDWN			(1 << 11)
+
+#define UTMI_CTRL_INPKT_DELAY_SHIFT		30
+#define UTMI_CTRL_INPKT_DELAY_SOF_SHIFT		28
+#define UTMI_CTRL_PU_REF_SHIFT			20
+#define UTMI_CTRL_ARC_PULLDN_SHIFT		12
+#define UTMI_CTRL_PLL_PWR_UP_SHIFT		1
+#define UTMI_CTRL_PWR_UP_SHIFT			0
+/* For UTMI_PLL Register */
+#define UTMI_PLL_CLK_BLK_EN_SHIFT		24
+#define UTMI_PLL_FBDIV_SHIFT			4
+#define UTMI_PLL_REFDIV_SHIFT			0
+#define UTMI_PLL_FBDIV_MASK			0x00000FF0
+#define UTMI_PLL_REFDIV_MASK			0x0000000F
+#define UTMI_PLL_ICP_MASK			0x00007000
+#define UTMI_PLL_KVCO_MASK			0x00031000
+#define UTMI_PLL_PLLCALI12_SHIFT		29
+#define UTMI_PLL_PLLCALI12_MASK			(0x3 << 29)
+#define UTMI_PLL_PLLVDD18_SHIFT			27
+#define UTMI_PLL_PLLVDD18_MASK			(0x3 << 27)
+#define UTMI_PLL_PLLVDD12_SHIFT			25
+#define UTMI_PLL_PLLVDD12_MASK			(0x3 << 25)
+#define UTMI_PLL_KVCO_SHIFT			15
+#define UTMI_PLL_ICP_SHIFT			12
+/* For UTMI_TX Register */
+#define UTMI_TX_REG_EXT_FS_RCAL_SHIFT		27
+#define UTMI_TX_REG_EXT_FS_RCAL_MASK		(0xf << 27)
+#define UTMI_TX_REG_EXT_FS_RCAL_EN_MASK		26
+#define UTMI_TX_REG_EXT_FS_RCAL_EN		(0x1 << 26)
+#define UTMI_TX_LOW_VDD_EN_SHIFT		11
+#define UTMI_TX_IMPCAL_VTH_SHIFT		14
+#define UTMI_TX_IMPCAL_VTH_MASK			(0x7 << 14)
+#define UTMI_TX_CK60_PHSEL_SHIFT		17
+#define UTMI_TX_CK60_PHSEL_MASK			(0xf << 17)
+#define UTMI_TX_TXVDD12_SHIFT                   22
+#define UTMI_TX_TXVDD12_MASK			(0x3 << 22)
+#define UTMI_TX_AMP_SHIFT			0
+#define UTMI_TX_AMP_MASK			(0x7 << 0)
+/* For UTMI_RX Register */
+#define UTMI_RX_SQ_THRESH_SHIFT			4
+#define UTMI_RX_SQ_THRESH_MASK			(0xf << 4)
+#define UTMI_REG_SQ_LENGTH_SHIFT		15
+#define UTMI_REG_SQ_LENGTH_MASK			(0x3 << 15)
+
+#define REG_RCAL_START				0x00001000
+#define VCOCAL_START				0x00200000
+#define KVCO_EXT				0x00400000
+#define PLL_READY				0x00800000
+#define CLK_BLK_EN				0x01000000
+#endif
+
+static unsigned int u2o_read(unsigned int base, unsigned int offset)
+{
+	return readl(base + offset);
+}
+
+static void u2o_set(unsigned int base, unsigned int offset, unsigned int value)
+{
+	unsigned int reg;
+
+	reg = readl(base + offset);
+	reg |= value;
+	writel(reg, base + offset);
+	readl(base + offset);
+}
+
+static void u2o_clear(unsigned int base, unsigned int offset,
+	unsigned int value)
+{
+	unsigned int reg;
+
+	reg = readl(base + offset);
+	reg &= ~value;
+	writel(reg, base + offset);
+	readl(base + offset);
+}
+
+static void u2o_write(unsigned int base, unsigned int offset,
+	unsigned int value)
+{
+	writel(value, base + offset);
+	readl(base + offset);
+}
+
+#ifdef CONFIG_ARCH_MMP
+int mv_udc_phy_init(unsigned int base)
+{
+	unsigned long timeout;
+
+	/* Initialize the USB PHY power */
+	if (cpu_is_pxa910()) {
+		u2o_set(base, UTMI_CTRL, (1 << UTMI_CTRL_INPKT_DELAY_SOF_SHIFT)
+			| (1 << UTMI_CTRL_PU_REF_SHIFT));
+	}
+
+	u2o_set(base, UTMI_CTRL, 1 << UTMI_CTRL_PLL_PWR_UP_SHIFT);
+	u2o_set(base, UTMI_CTRL, 1 << UTMI_CTRL_PWR_UP_SHIFT);
+
+	/* UTMI_PLL settings */
+	u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK
+		| UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK
+		| UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK
+		| UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK);
+
+	u2o_set(base, UTMI_PLL, (0xee << UTMI_PLL_FBDIV_SHIFT)
+		| (0xb << UTMI_PLL_REFDIV_SHIFT)
+		| (3 << UTMI_PLL_PLLVDD18_SHIFT)
+		| (3 << UTMI_PLL_PLLVDD12_SHIFT)
+		| (3 << UTMI_PLL_PLLCALI12_SHIFT)
+		| (1 << UTMI_PLL_ICP_SHIFT) | (3 << UTMI_PLL_KVCO_SHIFT));
+
+	/* UTMI_TX */
+	u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
+		| UTMI_TX_TXVDD12_MASK
+		| UTMI_TX_CK60_PHSEL_MASK | UTMI_TX_IMPCAL_VTH_MASK
+		| UTMI_TX_REG_EXT_FS_RCAL_MASK | UTMI_TX_AMP_MASK);
+	u2o_set(base, UTMI_TX, (3 << UTMI_TX_TXVDD12_SHIFT)
+		| (4 << UTMI_TX_CK60_PHSEL_SHIFT)
+		| (4 << UTMI_TX_IMPCAL_VTH_SHIFT)
+		| (8 << UTMI_TX_REG_EXT_FS_RCAL_SHIFT)
+		| (3 << UTMI_TX_AMP_SHIFT));
+
+	/* UTMI_RX */
+	u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK
+		| UTMI_REG_SQ_LENGTH_MASK);
+	if (cpu_is_pxa168())
+		u2o_set(base, UTMI_RX, (7 << UTMI_RX_SQ_THRESH_SHIFT)
+			| (2 << UTMI_REG_SQ_LENGTH_SHIFT));
+	else
+		u2o_set(base, UTMI_RX, (0x7 << UTMI_RX_SQ_THRESH_SHIFT)
+			| (2 << UTMI_REG_SQ_LENGTH_SHIFT));
+
+	/* UTMI_IVREF */
+	if (cpu_is_pxa168())
+		/*
+		 * fixing Microsoft Altair board interface with NEC hub issue -
+		 * Set UTMI_IVREF from 0x4a3 to 0x4bf
+		 */
+		u2o_write(base, UTMI_IVREF, 0x4bf);
+
+	/* calibrate */
+	timeout = jiffies + 100;
+	while ((u2o_read(base, UTMI_PLL) & PLL_READY) == 0) {
+		if (time_after(jiffies, timeout))
+			return -ETIME;
+		cpu_relax();
+	}
+
+	/* toggle VCOCAL_START bit of UTMI_PLL */
+	udelay(200);
+	u2o_set(base, UTMI_PLL, VCOCAL_START);
+	udelay(40);
+	u2o_clear(base, UTMI_PLL, VCOCAL_START);
+
+	/* toggle REG_RCAL_START bit of UTMI_TX */
+	udelay(200);
+	u2o_set(base, UTMI_TX, REG_RCAL_START);
+	udelay(40);
+	u2o_clear(base, UTMI_TX, REG_RCAL_START);
+	udelay(200);
+
+	/* make sure phy is ready */
+	timeout = jiffies + 100;
+	while ((u2o_read(base, UTMI_PLL) & PLL_READY) == 0) {
+		if (time_after(jiffies, timeout))
+			return -ETIME;
+		cpu_relax();
+	}
+
+	if (cpu_is_pxa168()) {
+		u2o_set(base, UTMI_RESERVE, 1 << 5);
+		/* Turn on UTMI PHY OTG extension */
+		u2o_write(base, UTMI_OTG_ADDON, 1);
+	}
+	return 0;
+}
+#else
+int mv_udc_phy_init(unsigned int base)
+{
+	return 0;
+}
+#endif