usb : musb : Adding DM6446 (TI DaVinci) platform specific USB support

Adding DM6446 (TI DaVinci) platform specific USB functionality for
USB Phy and VBUS initialization.

Signed-off-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: Swaminathan S <swami.iyer@ti.com>
Signed-off-by: Thomas Abraham <t-abraham@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>

1 files changed, 87 insertions, 0 deletions

diff --git a/drivers/usb/davinci_usb.h b/drivers/usb/davinci_usb.h
new file mode 100644
index 0000000..d270861
--- /dev/null
+++ b/drivers/usb/davinci_usb.h
@@ -0,0 +1,87 @@
+/*
+ * TI's Davinci platform specific USB wrapper functions.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
+ */
+
+#ifndef __DAVINCI_USB_H__
+#define __DAVINCI_USB_H__
+
+#include <asm/arch/hardware.h>
+#include "musb_core.h"
+
+/* Base address of DAVINCI usb0 wrapper */
+#define DAVINCI_USB0_BASE 0x01C64000
+
+/* Base address of DAVINCI musb core */
+#define MENTOR_USB0_BASE (DAVINCI_USB0_BASE+0x400)
+
+/*
+ * Davinci platform USB wrapper register overlay. Note: Only the required
+ * registers are included in this structure. It can be expanded as required.
+ */
+struct davinci_usb_regs {
+	u32	version;
+	u32	ctrlr;
+	u32	reserved[0x20];
+	u32	intclrr;
+	u32 	intmskr;
+	u32 	intmsksetr;
+};
+
+#define DAVINCI_USB_TX_ENDPTS_MASK	0x1f /* ep0 + 4 tx */
+#define DAVINCI_USB_RX_ENDPTS_MASK	0x1e /* 4 rx */
+#define DAVINCI_USB_USBINT_SHIFT	16
+#define DAVINCI_USB_TXINT_SHIFT 	0
+#define DAVINCI_USB_RXINT_SHIFT 	8
+#define DAVINCI_INTR_DRVVBUS		0x0100
+
+#define DAVINCI_USB_USBINT_MASK 	0x01ff0000	/* 8 Mentor, DRVVBUS */
+#define DAVINCI_USB_TXINT_MASK \
+		(DAVINCI_USB_TX_ENDPTS_MASK << DAVINCI_USB_TXINT_SHIFT)
+#define DAVINCI_USB_RXINT_MASK \
+		(DAVINCI_USB_RX_ENDPTS_MASK << DAVINCI_USB_RXINT_SHIFT)
+#define MGC_BUSCTL_OFFSET(_bEnd, _bOffset) \
+		(0x80 + (8*(_bEnd)) + (_bOffset))
+
+/* Integrated highspeed/otg PHY */
+#define USBPHY_CTL_PADDR	(DAVINCI_SYSTEM_MODULE_BASE + 0x34)
+#define USBPHY_PHYCLKGD 	(1 << 8)
+#define USBPHY_SESNDEN		(1 << 7)	/* v(sess_end) comparator */
+#define USBPHY_VBDTCTEN 	(1 << 6)	/* v(bus) comparator */
+#define USBPHY_PHYPLLON 	(1 << 4)	/* override pll suspend */
+#define USBPHY_CLKO1SEL 	(1 << 3)
+#define USBPHY_OSCPDWN		(1 << 2)
+#define USBPHY_PHYPDWN		(1 << 0)
+
+/* Timeout for Davinci USB module */
+#define DAVINCI_USB_TIMEOUT 0x3FFFFFF
+
+/* IO Expander I2C address and VBUS enable mask */
+#define IOEXP_I2C_ADDR 0x3A
+#define IOEXP_VBUSEN_MASK 1
+
+/* extern functions */
+extern void lpsc_on(unsigned int id);
+extern int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
+extern int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len);
+extern void enable_vbus(void);
+#endif	/* __DAVINCI_USB_H__ */
+