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/*
* MUSB OTG driver register I/O
*
* Copyright 2005 Mentor Graphics Corporation
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __MUSB_LINUX_PLATFORM_ARCH_H__
#define __MUSB_LINUX_PLATFORM_ARCH_H__
#include <linux/io.h>
#include <linux/spinlock.h>
extern bool mtk_usb_power;
extern bool usb_enable_clock(bool enable);
extern spinlock_t usb_io_lock;
static inline u16 musb_readw(const void __iomem *addr, unsigned offset)
{
u16 rc = 0;
if (mtk_usb_power) {
rc = readw(addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
rc = readw(addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
return rc;
}
static inline u32 musb_readl(const void __iomem *addr, unsigned offset)
{
u32 rc = 0;
if (mtk_usb_power) {
rc = readl(addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
rc = readl(addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
return rc;
}
static inline void musb_writew(void __iomem *addr, unsigned offset, u16 data)
{
if (mtk_usb_power) {
writew(data, addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
writew(data, addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
}
static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
{
if (mtk_usb_power) {
writel(data, addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
writel(data, addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
}
static inline u8 musb_readb(const void __iomem *addr, unsigned offset)
{
u8 rc = 0;
if (mtk_usb_power) {
rc = readb(addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
rc = readb(addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
return rc;
}
static inline void musb_writeb(void __iomem *addr, unsigned offset, u8 data)
{
if (mtk_usb_power) {
writeb(data, addr + offset);
} else {
unsigned long flags = 0;
spin_lock_irqsave(&usb_io_lock, flags);
usb_enable_clock(true);
DBG(0, "[MUSB]:access %s function when usb clock is off 0x%X\n", __func__, offset);
writeb(data, addr + offset);
usb_enable_clock(false);
spin_unlock_irqrestore(&usb_io_lock, flags);
}
}
#if 0
struct musb_reg {
u8(*_readb) (u32 addr, u32 offset);
u16(*_readw) (u32 addr, u32 offset);
u32(*_readl) (u32 addr, u32 offset);
void (*_writeb) (u32 addr, u32 offset, u8 data);
void (*_writew) (u32 addr, u32 offset, u16 data);
void (*_writel) (u32 addr, u32 offset, u32 data);
};
/* NOTE: these offsets are all in bytes */
static inline u16 power_on_readw(const void __iomem *addr, unsigned offset)
{
return __raw_readw(addr + offset);
}
static inline u32 power_on_readl(const void __iomem *addr, unsigned offset)
{
return __raw_readl(addr + offset);
}
static inline void power_on_writew(void __iomem *addr, unsigned offset, u16 data)
{
__raw_writew(data, addr + offset);
}
static inline void power_on_writel(void __iomem *addr, unsigned offset, u32 data)
{
__raw_writel(data, addr + offset);
}
static inline u8 power_on_readb(const void __iomem *addr, unsigned offset)
{
return __raw_readb(addr + offset);
}
static inline void power_on_writeb(void __iomem *addr, unsigned offset, u8 data)
{
__raw_writeb(data, addr + offset);
}
static inline u16 power_off_readw(const void __iomem *addr, unsigned offset)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
return 0;
}
static inline u32 power_off_readl(const void __iomem *addr, unsigned offset)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
return 0;
}
static inline void power_off_writew(void __iomem *addr, unsigned offset, u16 data)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
}
static inline void power_off_writel(void __iomem *addr, unsigned offset, u32 data)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
}
static inline u8 power_off_readb(const void __iomem *addr, unsigned offset)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
return 0;
}
static inline void power_off_writeb(void __iomem *addr, unsigned offset, u8 data)
{
printk("MUSB:access %s function when usb clock is off\n", __func__);
}
extern struct musb_reg musb_reg;
#define musb_readb musb_reg._readb
#define musb_readw musb_reg._readl
#define musb_readl musb_reg._readw
#define musb_writeb musb_reg._writeb
#define musb_writew musb_reg._writew
#define musb_writel musb_reg._writel
#endif
#endif
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