usb: musb: add support for Blackfin MUSB

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Remy Bohmer <linux@bohmer.net>

7 files changed, 528 insertions, 2 deletions

diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index 12e115e..397f5fe 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -27,6 +27,7 @@ LIB	:= $(obj)libusb_musb.a
 
 COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
 COBJS-$(CONFIG_MUSB_UDC) += musb_udc.o musb_core.o
+COBJS-$(CONFIG_USB_BLACKFIN) += blackfin_usb.o
 COBJS-$(CONFIG_USB_DAVINCI) += davinci.o
 COBJS-$(CONFIG_USB_OMAP3) += omap3.o
 COBJS-$(CONFIG_USB_DA8XX) += da8xx.o
diff --git a/drivers/usb/musb/blackfin_usb.c b/drivers/usb/musb/blackfin_usb.c
new file mode 100644
index 0000000..38aceb2
--- /dev/null
+++ b/drivers/usb/musb/blackfin_usb.c
@@ -0,0 +1,143 @@
+/*
+ * Blackfin MUSB HCD (Host Controller Driver) for u-boot
+ *
+ * Copyright (c) 2008-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+
+#include <usb.h>
+
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/usb.h>
+
+#include "musb_core.h"
+
+/* MUSB platform configuration */
+struct musb_config musb_cfg = {
+	.regs       = (struct musb_regs *)USB_FADDR,
+	.timeout    = 0x3FFFFFF,
+	.musb_speed = 0,
+};
+
+/*
+ * This function read or write data to endpoint fifo
+ * Blackfin use DMA polling method to avoid buffer alignment issues
+ *
+ * ep		- Endpoint number
+ * length	- Number of bytes to write to FIFO
+ * fifo_data	- Pointer to data buffer to be read/write
+ * is_write	- Flag for read or write
+ */
+void rw_fifo(u8 ep, u32 length, void *fifo_data, int is_write)
+{
+	struct bfin_musb_dma_regs *regs;
+	u32 val = (u32)fifo_data;
+
+	blackfin_dcache_flush_invalidate_range(fifo_data, fifo_data + length);
+
+	regs = (void *)USB_DMA_INTERRUPT;
+	regs += ep;
+
+	/* Setup DMA address register */
+	bfin_write16(&regs->addr_low, val);
+	SSYNC();
+
+	bfin_write16(&regs->addr_high, val >> 16);
+	SSYNC();
+
+	/* Setup DMA count register */
+	bfin_write16(&regs->count_low, length);
+	bfin_write16(&regs->count_high, 0);
+	SSYNC();
+
+	/* Enable the DMA */
+	val = (ep << 4) | DMA_ENA | INT_ENA;
+	if (is_write)
+		val |= DIRECTION;
+	bfin_write16(&regs->control, val);
+	SSYNC();
+
+	/* Wait for compelete */
+	while (!(bfin_read_USB_DMA_INTERRUPT() & (1 << ep)))
+		continue;
+
+	/* acknowledge dma interrupt */
+	bfin_write_USB_DMA_INTERRUPT(1 << ep);
+	SSYNC();
+
+	/* Reset DMA */
+	bfin_write16(&regs->control, 0);
+	SSYNC();
+}
+
+void write_fifo(u8 ep, u32 length, void *fifo_data)
+{
+	rw_fifo(ep, length, fifo_data, 1);
+}
+
+void read_fifo(u8 ep, u32 length, void *fifo_data)
+{
+	rw_fifo(ep, length, fifo_data, 0);
+}
+
+
+/*
+ * CPU and board-specific MUSB initializations.  Aliased function
+ * signals caller to move on.
+ */
+static void __def_musb_init(void)
+{
+}
+void board_musb_init(void) __attribute__((weak, alias("__def_musb_init")));
+
+int musb_platform_init(void)
+{
+	/* board specific initialization */
+	board_musb_init();
+
+	if (ANOMALY_05000346) {
+		bfin_write_USB_APHY_CALIB(ANOMALY_05000346_value);
+		SSYNC();
+	}
+
+	if (ANOMALY_05000347) {
+		bfin_write_USB_APHY_CNTRL(0x0);
+		SSYNC();
+	}
+
+	/* Configure PLL oscillator register */
+	bfin_write_USB_PLLOSC_CTRL(0x30a8);
+	SSYNC();
+
+	bfin_write_USB_SRP_CLKDIV((get_sclk()/1000) / 32 - 1);
+	SSYNC();
+
+	bfin_write_USB_EP_NI0_RXMAXP(64);
+	SSYNC();
+
+	bfin_write_USB_EP_NI0_TXMAXP(64);
+	SSYNC();
+
+	/* Route INTRUSB/INTR_RX/INTR_TX to USB_INT0*/
+	bfin_write_USB_GLOBINTR(0x7);
+	SSYNC();
+
+	bfin_write_USB_GLOBAL_CTL(GLOBAL_ENA | EP1_TX_ENA | EP2_TX_ENA |
+				EP3_TX_ENA | EP4_TX_ENA | EP5_TX_ENA |
+				EP6_TX_ENA | EP7_TX_ENA | EP1_RX_ENA |
+				EP2_RX_ENA | EP3_RX_ENA | EP4_RX_ENA |
+				EP5_RX_ENA | EP6_RX_ENA | EP7_RX_ENA);
+	SSYNC();
+
+	return 0;
+}
+
+/*
+ * This function performs Blackfin platform specific deinitialization for usb.
+*/
+void musb_platform_deinit(void)
+{
+}
diff --git a/drivers/usb/musb/blackfin_usb.h b/drivers/usb/musb/blackfin_usb.h
new file mode 100644
index 0000000..ab26ca2
--- /dev/null
+++ b/drivers/usb/musb/blackfin_usb.h
@@ -0,0 +1,99 @@
+/*
+ * Blackfin MUSB HCD (Host Controller Driver) for u-boot
+ *
+ * Copyright (c) 2008-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __BLACKFIN_USB_H__
+#define __BLACKFIN_USB_H__
+
+#include <linux/types.h>
+
+/* Every register is 32bit aligned, but only 16bits in size */
+#define ureg(name) u16 name; u16 __pad_##name;
+
+#define musb_regs musb_regs
+struct musb_regs {
+	/* common registers */
+	ureg(faddr)
+	ureg(power)
+	ureg(intrtx)
+	ureg(intrrx)
+	ureg(intrtxe)
+	ureg(intrrxe)
+	ureg(intrusb)
+	ureg(intrusbe)
+	ureg(frame)
+	ureg(index)
+	ureg(testmode)
+	ureg(globintr)
+	ureg(global_ctl)
+	u32	reserved0[3];
+	/* indexed registers */
+	ureg(txmaxp)
+	ureg(txcsr)
+	ureg(rxmaxp)
+	ureg(rxcsr)
+	ureg(rxcount)
+	ureg(txtype)
+	ureg(txinterval)
+	ureg(rxtype)
+	ureg(rxinterval)
+	u32	reserved1;
+	ureg(txcount)
+	u32	reserved2[5];
+	/* fifo */
+	u16	fifox[32];
+	/* OTG, dynamic FIFO, version & vendor registers */
+	u32	reserved3[16];
+	ureg(devctl)
+	ureg(vbus_irq)
+	ureg(vbus_mask)
+	u32 reserved4[15];
+	ureg(linkinfo)
+	ureg(vplen)
+	ureg(hseof1)
+	ureg(fseof1)
+	ureg(lseof1)
+	u32 reserved5[41];
+	/* target address registers */
+	struct musb_tar_regs {
+		ureg(txmaxp)
+		ureg(txcsr)
+		ureg(rxmaxp)
+		ureg(rxcsr)
+		ureg(rxcount)
+		ureg(txtype)
+		ureg(txinternal)
+		ureg(rxtype)
+		ureg(rxinternal)
+		u32	reserved6;
+		ureg(txcount)
+		u32 reserved7[5];
+	} tar[8];
+} __attribute__((packed));
+
+struct bfin_musb_dma_regs {
+	ureg(interrupt);
+	ureg(control);
+	ureg(addr_low);
+	ureg(addr_high);
+	ureg(count_low);
+	ureg(count_high);
+	ureg(pad);
+};
+
+#undef ureg
+
+/* EP5-EP7 are the only ones with 1024 byte FIFOs which BULK really needs */
+#define MUSB_BULK_EP 5
+
+/* Blackfin FIFO's are static */
+#define MUSB_NO_DYNAMIC_FIFO
+
+/* No HUB support :( */
+#define MUSB_NO_MULTIPOINT
+
+#endif
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index cee7a11..f0f0301 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -38,6 +38,10 @@
 #include <usb_defs.h>
 #include <asm/io.h>
 
+#ifdef CONFIG_USB_BLACKFIN
+# include "blackfin_usb.h"
+#endif
+
 #define MUSB_EP0_FIFOSIZE	64	/* This is non-configurable */
 
 /* EP0 */
@@ -71,6 +75,7 @@ struct musb_epN_regs {
 };
 
 /* Mentor USB core register overlay structure */
+#ifndef musb_regs
 struct musb_regs {
 	/* common registers */
 	u8	faddr;
@@ -138,6 +143,7 @@ struct musb_regs {
 	} ep[16];
 
 } __attribute__((packed, aligned(32)));
+#endif
 
 /*
  * MUSB Register bits
@@ -347,4 +353,14 @@ extern void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt);
 extern void write_fifo(u8 ep, u32 length, void *fifo_data);
 extern void read_fifo(u8 ep, u32 length, void *fifo_data);
 
+#if defined(CONFIG_USB_BLACKFIN)
+/* Every USB register is accessed as a 16-bit even if the value itself
+ * is only 8-bits in size.  Fun stuff.
+ */
+# undef  readb
+# define readb(addr)     (u8)bfin_read16(addr)
+# undef  writeb
+# define writeb(b, addr) bfin_write16(addr, b)
+#endif
+
 #endif	/* __MUSB_HDRC_DEFS_H__ */
diff --git a/drivers/usb/musb/musb_hcd.h b/drivers/usb/musb/musb_hcd.h
index 17e9091..a437985 100644
--- a/drivers/usb/musb/musb_hcd.h
+++ b/drivers/usb/musb/musb_hcd.h
@@ -38,7 +38,9 @@ extern unsigned char new[];
 #define MUSB_CONTROL_EP 0
 
 /* This defines the endpoint number used for bulk transfer */
-#define MUSB_BULK_EP 1
+#ifndef MUSB_BULK_EP
+# define MUSB_BULK_EP 1
+#endif
 
 /* This defines the endpoint number used for interrupt transfer */
 #define MUSB_INTR_EP 2
diff --git a/include/asm-blackfin/mach-common/bits/usb.h b/include/asm-blackfin/mach-common/bits/usb.h
new file mode 100644
index 0000000..c639058
--- /dev/null
+++ b/include/asm-blackfin/mach-common/bits/usb.h
@@ -0,0 +1,264 @@
+/*
+ * USB Masks
+ */
+
+#ifndef __BFIN_PERIPHERAL_USB__
+#define __BFIN_PERIPHERAL_USB__
+
+/* Bit masks for USB_FADDR */
+
+#define FUNCTION_ADDRESS	0x7f	/* Function address */
+
+/* Bit masks for USB_POWER */
+
+#define ENABLE_SUSPENDM		0x1	/* enable SuspendM output */
+#define SUSPEND_MODE		0x2	/* Suspend Mode indicator */
+#define RESUME_MODE		0x4	/* DMA Mode */
+#define RESET			0x8	/* Reset indicator */
+#define HS_MODE			0x10	/* High Speed mode indicator */
+#define HS_ENABLE		0x20	/* high Speed Enable */
+#define SOFT_CONN		0x40	/* Soft connect */
+#define ISO_UPDATE		0x80	/* Isochronous update */
+
+/* Bit masks for USB_INTRTX */
+
+#define EP0_TX			0x1	/* Tx Endpoint 0 interrupt */
+#define EP1_TX			0x2	/* Tx Endpoint 1 interrupt */
+#define EP2_TX			0x4	/* Tx Endpoint 2 interrupt */
+#define EP3_TX			0x8	/* Tx Endpoint 3 interrupt */
+#define EP4_TX			0x10	/* Tx Endpoint 4 interrupt */
+#define EP5_TX			0x20	/* Tx Endpoint 5 interrupt */
+#define EP6_TX			0x40	/* Tx Endpoint 6 interrupt */
+#define EP7_TX			0x80	/* Tx Endpoint 7 interrupt */
+
+/* Bit masks for USB_INTRRX */
+
+#define EP1_RX			0x2	/* Rx Endpoint 1 interrupt */
+#define EP2_RX			0x4	/* Rx Endpoint 2 interrupt */
+#define EP3_RX			0x8	/* Rx Endpoint 3 interrupt */
+#define EP4_RX			0x10	/* Rx Endpoint 4 interrupt */
+#define EP5_RX			0x20	/* Rx Endpoint 5 interrupt */
+#define EP6_RX			0x40	/* Rx Endpoint 6 interrupt */
+#define EP7_RX			0x80	/* Rx Endpoint 7 interrupt */
+
+/* Bit masks for USB_INTRTXE */
+
+#define EP0_TX_E		0x1	/* Endpoint 0 interrupt Enable */
+#define EP1_TX_E		0x2	/* Tx Endpoint 1 interrupt enable */
+#define EP2_TX_E		0x4	/* Tx Endpoint 2 interrupt enable */
+#define EP3_TX_E		0x8	/* Tx Endpoint 3 interrupt enable */
+#define EP4_TX_E		0x10	/* Tx Endpoint 4 interrupt enable */
+#define EP5_TX_E		0x20	/* Tx Endpoint 5 interrupt enable */
+#define EP6_TX_E		0x40	/* Tx Endpoint 6 interrupt enable */
+#define EP7_TX_E		0x80	/* Tx Endpoint 7 interrupt enable */
+
+/* Bit masks for USB_INTRRXE */
+
+#define EP1_RX_E		0x02	/* Rx Endpoint 1 interrupt enable */
+#define EP2_RX_E		0x04	/* Rx Endpoint 2 interrupt enable */
+#define EP3_RX_E		0x08	/* Rx Endpoint 3 interrupt enable */
+#define EP4_RX_E		0x10	/* Rx Endpoint 4 interrupt enable */
+#define EP5_RX_E		0x20	/* Rx Endpoint 5 interrupt enable */
+#define EP6_RX_E		0x40	/* Rx Endpoint 6 interrupt enable */
+#define EP7_RX_E		0x80	/* Rx Endpoint 7 interrupt enable */
+
+/* Bit masks for USB_INTRUSB */
+
+#define SUSPEND_B		0x01	/* Suspend indicator */
+#define RESUME_B		0x02	/* Resume indicator */
+#define RESET_OR_BABLE_B	0x04	/* Reset/babble indicator */
+#define SOF_B			0x08	/* Start of frame */
+#define CONN_B			0x10	/* Connection indicator */
+#define DISCON_B		0x20	/* Disconnect indicator */
+#define SESSION_REQ_B		0x40	/* Session Request */
+#define VBUS_ERROR_B		0x80	/* Vbus threshold indicator */
+
+/* Bit masks for USB_INTRUSBE */
+
+#define SUSPEND_BE		0x01	/* Suspend indicator int enable */
+#define RESUME_BE		0x02	/* Resume indicator int enable */
+#define RESET_OR_BABLE_BE	0x04	/* Reset/babble indicator int enable */
+#define SOF_BE			0x08	/* Start of frame int enable */
+#define CONN_BE			0x10	/* Connection indicator int enable */
+#define DISCON_BE		0x20	/* Disconnect indicator int enable */
+#define SESSION_REQ_BE		0x40	/* Session Request int enable */
+#define VBUS_ERROR_BE		0x80	/* Vbus threshold indicator int enable */
+
+/* Bit masks for USB_FRAME */
+
+#define FRAME_NUMBER		0x7ff	/* Frame number */
+
+/* Bit masks for USB_INDEX */
+
+#define SELECTED_ENDPOINT	0xf	/* selected endpoint */
+
+/* Bit masks for USB_GLOBAL_CTL */
+
+#define GLOBAL_ENA		0x0001	/* enables USB module */
+#define EP1_TX_ENA		0x0002	/* Transmit endpoint 1 enable */
+#define EP2_TX_ENA		0x0004	/* Transmit endpoint 2 enable */
+#define EP3_TX_ENA		0x0008	/* Transmit endpoint 3 enable */
+#define EP4_TX_ENA		0x0010	/* Transmit endpoint 4 enable */
+#define EP5_TX_ENA		0x0020	/* Transmit endpoint 5 enable */
+#define EP6_TX_ENA		0x0040	/* Transmit endpoint 6 enable */
+#define EP7_TX_ENA		0x0080	/* Transmit endpoint 7 enable */
+#define EP1_RX_ENA		0x0100	/* Receive endpoint 1 enable */
+#define EP2_RX_ENA		0x0200	/* Receive endpoint 2 enable */
+#define EP3_RX_ENA		0x0400	/* Receive endpoint 3 enable */
+#define EP4_RX_ENA		0x0800	/* Receive endpoint 4 enable */
+#define EP5_RX_ENA		0x1000	/* Receive endpoint 5 enable */
+#define EP6_RX_ENA		0x2000	/* Receive endpoint 6 enable */
+#define EP7_RX_ENA		0x4000	/* Receive endpoint 7 enable */
+
+/* Bit masks for USB_OTG_DEV_CTL */
+
+#define SESSION			0x1	/* session indicator */
+#define HOST_REQ		0x2	/* Host negotiation request */
+#define HOST_MODE		0x4	/* indicates USBDRC is a host */
+#define VBUS0			0x8	/* Vbus level indicator[0] */
+#define VBUS1			0x10	/* Vbus level indicator[1] */
+#define LSDEV			0x20	/* Low-speed indicator */
+#define FSDEV			0x40	/* Full or High-speed indicator */
+#define B_DEVICE		0x80	/* A' or 'B' device indicator */
+
+/* Bit masks for USB_OTG_VBUS_IRQ */
+
+#define DRIVE_VBUS_ON		0x1	/* indicator to drive VBUS control circuit */
+#define DRIVE_VBUS_OFF		0x2	/* indicator to shut off charge pump */
+#define CHRG_VBUS_START		0x4	/* indicator for external circuit to start charging VBUS */
+#define CHRG_VBUS_END		0x8	/* indicator for external circuit to end charging VBUS */
+#define DISCHRG_VBUS_START	0x10	/* indicator to start discharging VBUS */
+#define DISCHRG_VBUS_END	0x20	/* indicator to stop discharging VBUS */
+
+/* Bit masks for USB_OTG_VBUS_MASK */
+
+#define DRIVE_VBUS_ON_ENA	0x01	/* enable DRIVE_VBUS_ON interrupt */
+#define DRIVE_VBUS_OFF_ENA	0x02	/* enable DRIVE_VBUS_OFF interrupt */
+#define CHRG_VBUS_START_ENA	0x04	/* enable CHRG_VBUS_START interrupt */
+#define CHRG_VBUS_END_ENA	0x08	/* enable CHRG_VBUS_END interrupt */
+#define DISCHRG_VBUS_START_ENA	0x10	/* enable DISCHRG_VBUS_START interrupt */
+#define DISCHRG_VBUS_END_ENA	0x20	/* enable DISCHRG_VBUS_END interrupt */
+
+/* Bit masks for USB_CSR0 */
+
+#define RXPKTRDY		0x1	/* data packet receive indicator */
+#define TXPKTRDY		0x2	/* data packet in FIFO indicator */
+#define STALL_SENT		0x4	/* STALL handshake sent */
+#define DATAEND			0x8	/* Data end indicator */
+#define SETUPEND		0x10	/* Setup end */
+#define SENDSTALL		0x20	/* Send STALL handshake */
+#define SERVICED_RXPKTRDY	0x40	/* used to clear the RxPktRdy bit */
+#define SERVICED_SETUPEND	0x80	/* used to clear the SetupEnd bit */
+#define FLUSHFIFO		0x100	/* flush endpoint FIFO */
+#define STALL_RECEIVED_H	0x4	/* STALL handshake received host mode */
+#define SETUPPKT_H		0x8	/* send Setup token host mode */
+#define ERROR_H			0x10	/* timeout error indicator host mode */
+#define REQPKT_H		0x20	/* Request an IN transaction host mode */
+#define STATUSPKT_H		0x40	/* Status stage transaction host mode */
+#define NAK_TIMEOUT_H		0x80	/* EP0 halted after a NAK host mode */
+
+/* Bit masks for USB_COUNT0 */
+
+#define EP0_RX_COUNT		0x7f	/* number of received bytes in EP0 FIFO */
+
+/* Bit masks for USB_NAKLIMIT0 */
+
+#define EP0_NAK_LIMIT		0x1f	/* frames/micro frames count after which EP0 timeouts */
+
+/* Bit masks for USB_TX_MAX_PACKET */
+
+#define MAX_PACKET_SIZE_T	0x7ff	/* maximum data pay load in a frame */
+
+/* Bit masks for USB_RX_MAX_PACKET */
+
+#define MAX_PACKET_SIZE_R	0x7ff	/* maximum data pay load in a frame */
+
+/* Bit masks for USB_TXCSR */
+
+#define TXPKTRDY_T		0x1	/* data packet in FIFO indicator */
+#define FIFO_NOT_EMPTY_T	0x2	/* FIFO not empty */
+#define UNDERRUN_T		0x4	/* TxPktRdy not set for an IN token */
+#define FLUSHFIFO_T		0x8	/* flush endpoint FIFO */
+#define STALL_SEND_T		0x10	/* issue a Stall handshake */
+#define STALL_SENT_T		0x20	/* Stall handshake transmitted */
+#define CLEAR_DATATOGGLE_T	0x40	/* clear endpoint data toggle */
+#define INCOMPTX_T		0x80	/* indicates that a large packet is split */
+#define DMAREQMODE_T		0x400	/* DMA mode (0 or 1) selection */
+#define FORCE_DATATOGGLE_T	0x800	/* Force data toggle */
+#define DMAREQ_ENA_T		0x1000	/* Enable DMA request for Tx EP */
+#define ISO_T			0x4000	/* enable Isochronous transfers */
+#define AUTOSET_T		0x8000	/* allows TxPktRdy to be set automatically */
+#define ERROR_TH		0x4	/* error condition host mode */
+#define STALL_RECEIVED_TH	0x20	/* Stall handshake received host mode */
+#define NAK_TIMEOUT_TH		0x80	/* NAK timeout host mode */
+
+/* Bit masks for USB_TXCOUNT */
+
+#define TX_COUNT		0x1fff	/* Byte len for the selected endpoint Tx FIFO */
+
+/* Bit masks for USB_RXCSR */
+
+#define RXPKTRDY_R		0x1	/* data packet in FIFO indicator */
+#define FIFO_FULL_R		0x2	/* FIFO not empty */
+#define OVERRUN_R		0x4	/* TxPktRdy not set for an IN token */
+#define DATAERROR_R		0x8	/* Out packet cannot be loaded into Rx FIFO */
+#define FLUSHFIFO_R		0x10	/* flush endpoint FIFO */
+#define STALL_SEND_R		0x20	/* issue a Stall handshake */
+#define STALL_SENT_R		0x40	/* Stall handshake transmitted */
+#define CLEAR_DATATOGGLE_R	0x80	/* clear endpoint data toggle */
+#define INCOMPRX_R		0x100	/* indicates that a large packet is split */
+#define DMAREQMODE_R		0x800	/* DMA mode (0 or 1) selection */
+#define DISNYET_R		0x1000	/* disable Nyet handshakes */
+#define DMAREQ_ENA_R		0x2000	/* Enable DMA request for Tx EP */
+#define ISO_R			0x4000	/* enable Isochronous transfers */
+#define AUTOCLEAR_R		0x8000	/* allows TxPktRdy to be set automatically */
+#define ERROR_RH		0x4	/* TxPktRdy not set for an IN token host mode */
+#define REQPKT_RH		0x20	/* request an IN transaction host mode */
+#define STALL_RECEIVED_RH	0x40	/* Stall handshake received host mode */
+#define INCOMPRX_RH		0x100	/* large packet is split host mode */
+#define DMAREQMODE_RH		0x800	/* DMA mode (0 or 1) selection host mode */
+#define AUTOREQ_RH		0x4000	/* sets ReqPkt automatically host mode */
+
+/* Bit masks for USB_RXCOUNT */
+
+#define RX_COUNT		0x1fff	/* Packet byte len in the Rx FIFO */
+
+/* Bit masks for USB_TXTYPE */
+
+#define TARGET_EP_NO_T		0xf	/* EP number */
+#define PROTOCOL_T		0xc	/* transfer type */
+
+/* Bit masks for USB_TXINTERVAL */
+
+#define TX_POLL_INTERVAL	0xff	/* polling interval for selected Tx EP */
+
+/* Bit masks for USB_RXTYPE */
+
+#define TARGET_EP_NO_R		0xf	/* EP number */
+#define PROTOCOL_R		0xc	/* transfer type */
+
+/* Bit masks for USB_RXINTERVAL */
+
+#define RX_POLL_INTERVAL	0xff	/* polling interval for selected Rx EP */
+
+/* Bit masks for USB_DMA_INTERRUPT */
+
+#define DMA0_INT		0x1	/* DMA0 pending interrupt */
+#define DMA1_INT		0x2	/* DMA1 pending interrupt */
+#define DMA2_INT		0x4	/* DMA2 pending interrupt */
+#define DMA3_INT		0x8	/* DMA3 pending interrupt */
+#define DMA4_INT		0x10	/* DMA4 pending interrupt */
+#define DMA5_INT		0x20	/* DMA5 pending interrupt */
+#define DMA6_INT		0x40	/* DMA6 pending interrupt */
+#define DMA7_INT		0x80	/* DMA7 pending interrupt */
+
+/* Bit masks for USB_DMAxCONTROL */
+
+#define DMA_ENA			0x1	/* DMA enable */
+#define DIRECTION		0x2	/* direction of DMA transfer */
+#define MODE			0x4	/* DMA Bus error */
+#define INT_ENA			0x8	/* Interrupt enable */
+#define EPNUM			0xf0	/* EP number */
+#define BUSERROR		0x100	/* DMA Bus error */
+
+#endif
diff --git a/include/usb.h b/include/usb.h
index 2a9cd04..a1f09d4 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -132,7 +132,8 @@ struct usb_device {
 	defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 	defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 	defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
-	defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX)
+	defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
+	defined(CONFIG_USB_BLACKFIN)
 
 int usb_lowlevel_init(void);
 int usb_lowlevel_stop(void);