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/*
* cx18 driver PCI memory mapped IO access routines
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
*
* 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
*/
#ifndef CX18_IO_H
#define CX18_IO_H
#include "cx18-driver.h"
/*
* Readback and retry of MMIO access for reliability:
* The concept was suggested by Steve Toth <stoth@linuxtv.org>.
* The implmentation is the fault of Andy Walls <awalls@md.metrocast.net>.
*
* *write* functions are implied to retry the mmio unless suffixed with _noretry
* *read* functions never retry the mmio (it never helps to do so)
*/
/* Non byteswapping memory mapped IO */
static inline u32 cx18_raw_readl(struct cx18 *cx, const void __iomem *addr)
{
return __raw_readl(addr);
}
static inline
void cx18_raw_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
{
__raw_writel(val, addr);
}
static inline void cx18_raw_writel(struct cx18 *cx, u32 val, void __iomem *addr)
{
int i;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_raw_writel_noretry(cx, val, addr);
if (val == cx18_raw_readl(cx, addr))
break;
}
}
/* Normal memory mapped IO */
static inline u32 cx18_readl(struct cx18 *cx, const void __iomem *addr)
{
return readl(addr);
}
static inline
void cx18_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
{
writel(val, addr);
}
static inline void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr)
{
int i;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writel_noretry(cx, val, addr);
if (val == cx18_readl(cx, addr))
break;
}
}
static inline
void cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
u32 eval, u32 mask)
{
int i;
u32 r;
eval &= mask;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writel_noretry(cx, val, addr);
r = cx18_readl(cx, addr);
if (r == 0xffffffff && eval != 0xffffffff)
continue;
if (eval == (r & mask))
break;
}
}
static inline u16 cx18_readw(struct cx18 *cx, const void __iomem *addr)
{
return readw(addr);
}
static inline
void cx18_writew_noretry(struct cx18 *cx, u16 val, void __iomem *addr)
{
writew(val, addr);
}
static inline void cx18_writew(struct cx18 *cx, u16 val, void __iomem *addr)
{
int i;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writew_noretry(cx, val, addr);
if (val == cx18_readw(cx, addr))
break;
}
}
static inline u8 cx18_readb(struct cx18 *cx, const void __iomem *addr)
{
return readb(addr);
}
static inline
void cx18_writeb_noretry(struct cx18 *cx, u8 val, void __iomem *addr)
{
writeb(val, addr);
}
static inline void cx18_writeb(struct cx18 *cx, u8 val, void __iomem *addr)
{
int i;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writeb_noretry(cx, val, addr);
if (val == cx18_readb(cx, addr))
break;
}
}
static inline
void cx18_memcpy_fromio(struct cx18 *cx, void *to,
const void __iomem *from, unsigned int len)
{
memcpy_fromio(to, from, len);
}
void cx18_memset_io(struct cx18 *cx, void __iomem *addr, int val, size_t count);
/* Access "register" region of CX23418 memory mapped I/O */
static inline void cx18_write_reg_noretry(struct cx18 *cx, u32 val, u32 reg)
{
cx18_writel_noretry(cx, val, cx->reg_mem + reg);
}
static inline void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg)
{
cx18_writel(cx, val, cx->reg_mem + reg);
}
static inline void cx18_write_reg_expect(struct cx18 *cx, u32 val, u32 reg,
u32 eval, u32 mask)
{
cx18_writel_expect(cx, val, cx->reg_mem + reg, eval, mask);
}
static inline u32 cx18_read_reg(struct cx18 *cx, u32 reg)
{
return cx18_readl(cx, cx->reg_mem + reg);
}
/* Access "encoder memory" region of CX23418 memory mapped I/O */
static inline void cx18_write_enc(struct cx18 *cx, u32 val, u32 addr)
{
cx18_writel(cx, val, cx->enc_mem + addr);
}
static inline u32 cx18_read_enc(struct cx18 *cx, u32 addr)
{
return cx18_readl(cx, cx->enc_mem + addr);
}
void cx18_sw1_irq_enable(struct cx18 *cx, u32 val);
void cx18_sw1_irq_disable(struct cx18 *cx, u32 val);
void cx18_sw2_irq_enable(struct cx18 *cx, u32 val);
void cx18_sw2_irq_disable(struct cx18 *cx, u32 val);
void cx18_sw2_irq_disable_cpu(struct cx18 *cx, u32 val);
void cx18_setup_page(struct cx18 *cx, u32 addr);
#endif /* CX18_IO_H */
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