linux/drivers/media/video/cx18/cx18-io.h

/*
 *  cx18 driver PCI memory mapped IO access routines
 *
 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
 *  Copyright (C) 2008  Andy Walls <awalls@radix.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"

static inline void cx18_io_delay(struct cx18 *cx)
{
	if (cx->options.mmio_ndelay)
		ndelay(cx->options.mmio_ndelay);
}

/*
 * 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@radix.net>.
 */

/* Statistics gathering */
static inline
void cx18_log_write_retries(struct cx18 *cx, int i, const void __iomem *addr)
{
	if (i > CX18_MAX_MMIO_RETRIES)
		i = CX18_MAX_MMIO_RETRIES;
	atomic_inc(&cx->mmio_stats.retried_write[i]);
	return;
}

static inline
void cx18_log_read_retries(struct cx18 *cx, int i, const void __iomem *addr)
{
	if (i > CX18_MAX_MMIO_RETRIES)
		i = CX18_MAX_MMIO_RETRIES;
	atomic_inc(&cx->mmio_stats.retried_read[i]);
	return;
}

void cx18_log_statistics(struct cx18 *cx);

/* Non byteswapping memory mapped IO */
static inline
void cx18_raw_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
{
	__raw_writel(val, addr);
	cx18_io_delay(cx);
}

void cx18_raw_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr);

static inline void cx18_raw_writel(struct cx18 *cx, u32 val, void __iomem *addr)
{
	if (cx18_retry_mmio)
		cx18_raw_writel_retry(cx, val, addr);
	else
		cx18_raw_writel_noretry(cx, val, addr);
}


static inline
u32 cx18_raw_readl_noretry(struct cx18 *cx, const void __iomem *addr)
{
	u32 ret = __raw_readl(addr);
	cx18_io_delay(cx);
	return ret;
}

u32 cx18_raw_readl_retry(struct cx18 *cx, const void __iomem *addr);

static inline u32 cx18_raw_readl(struct cx18 *cx, const void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_raw_readl_retry(cx, addr);

	return cx18_raw_readl_noretry(cx, addr);
}


static inline
u16 cx18_raw_readw_noretry(struct cx18 *cx, const void __iomem *addr)
{
	u16 ret = __raw_readw(addr);
	cx18_io_delay(cx);
	return ret;
}

u16 cx18_raw_readw_retry(struct cx18 *cx, const void __iomem *addr);

static inline u16 cx18_raw_readw(struct cx18 *cx, const void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_raw_readw_retry(cx, addr);

	return cx18_raw_readw_noretry(cx, addr);
}


/* Normal memory mapped IO */
static inline
void cx18_writel_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
{
	writel(val, addr);
	cx18_io_delay(cx);
}

void cx18_writel_retry(struct cx18 *cx, u32 val, void __iomem *addr);

static inline void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr)
{
	if (cx18_retry_mmio)
		cx18_writel_retry(cx, val, addr);
	else
		cx18_writel_noretry(cx, val, addr);
}

void _cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
			 u32 eval, u32 mask);

static inline
void cx18_writew_noretry(struct cx18 *cx, u16 val, void __iomem *addr)
{
	writew(val, addr);
	cx18_io_delay(cx);
}

void cx18_writew_retry(struct cx18 *cx, u16 val, void __iomem *addr);

static inline void cx18_writew(struct cx18 *cx, u16 val, void __iomem *addr)
{
	if (cx18_retry_mmio)
		cx18_writew_retry(cx, val, addr);
	else
		cx18_writew_noretry(cx, val, addr);
}


static inline
void cx18_writeb_noretry(struct cx18 *cx, u8 val, void __iomem *addr)
{
	writeb(val, addr);
	cx18_io_delay(cx);
}

void cx18_writeb_retry(struct cx18 *cx, u8 val, void __iomem *addr);

static inline void cx18_writeb(struct cx18 *cx, u8 val, void __iomem *addr)
{
	if (cx18_retry_mmio)
		cx18_writeb_retry(cx, val, addr);
	else
		cx18_writeb_noretry(cx, val, addr);
}


static inline u32 cx18_readl_noretry(struct cx18 *cx, const void __iomem *addr)
{
	u32 ret = readl(addr);
	cx18_io_delay(cx);
	return ret;
}

u32 cx18_readl_retry(struct cx18 *cx, const void __iomem *addr);

static inline u32 cx18_readl(struct cx18 *cx, const void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_readl_retry(cx, addr);

	return cx18_readl_noretry(cx, addr);
}


static inline u16 cx18_readw_noretry(struct cx18 *cx, const void __iomem *addr)
{
	u16 ret = readw(addr);
	cx18_io_delay(cx);
	return ret;
}

u16 cx18_readw_retry(struct cx18 *cx, const void __iomem *addr);

static inline u16 cx18_readw(struct cx18 *cx, const void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_readw_retry(cx, addr);

	return cx18_readw_noretry(cx, addr);
}


static inline u8 cx18_readb_noretry(struct cx18 *cx, const void __iomem *addr)
{
	u8 ret = readb(addr);
	cx18_io_delay(cx);
	return ret;
}

u8 cx18_readb_retry(struct cx18 *cx, const void __iomem *addr);

static inline u8 cx18_readb(struct cx18 *cx, const void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_readb_retry(cx, addr);

	return cx18_readb_noretry(cx, addr);
}


static inline
u32 cx18_write_sync_noretry(struct cx18 *cx, u32 val, void __iomem *addr)
{
	cx18_writel_noretry(cx, val, addr);
	return cx18_readl_noretry(cx, addr);
}

static inline
u32 cx18_write_sync_retry(struct cx18 *cx, u32 val, void __iomem *addr)
{
	cx18_writel_retry(cx, val, addr);
	return cx18_readl_retry(cx, addr);
}

static inline u32 cx18_write_sync(struct cx18 *cx, u32 val, void __iomem *addr)
{
	if (cx18_retry_mmio)
		return cx18_write_sync_retry(cx, val, addr);

	return cx18_write_sync_noretry(cx, val, addr);
}


void cx18_memcpy_fromio(struct cx18 *cx, void *to,
			const void __iomem *from, unsigned int 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_retry(struct cx18 *cx, u32 val, u32 reg)
{
	cx18_writel_retry(cx, val, cx->reg_mem + reg);
}

static inline void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg)
{
	if (cx18_retry_mmio)
		cx18_write_reg_retry(cx, val, reg);
	else
		cx18_write_reg_noretry(cx, val, 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 void cx18_write_reg_expect(struct cx18 *cx, u32 val, u32 reg,
					 u32 eval, u32 mask)
{
	if (cx18_retry_mmio)
		_cx18_write_reg_expect(cx, val, reg, eval, mask);
	else
		cx18_write_reg_noretry(cx, val, reg);
}


static inline u32 cx18_read_reg_noretry(struct cx18 *cx, u32 reg)
{
	return cx18_readl_noretry(cx, cx->reg_mem + reg);
}

static inline u32 cx18_read_reg_retry(struct cx18 *cx, u32 reg)
{
	return cx18_readl_retry(cx, cx->reg_mem + reg);
}

static inline u32 cx18_read_reg(struct cx18 *cx, u32 reg)
{
	if (cx18_retry_mmio)
		return cx18_read_reg_retry(cx, reg);

	return cx18_read_reg_noretry(cx, reg);
}


static inline u32 cx18_write_reg_sync_noretry(struct cx18 *cx, u32 val, u32 reg)
{
	return cx18_write_sync_noretry(cx, val, cx->reg_mem + reg);
}

static inline u32 cx18_write_reg_sync_retry(struct cx18 *cx, u32 val, u32 reg)
{
	return cx18_write_sync_retry(cx, val, cx->reg_mem + reg);
}

static inline u32 cx18_write_reg_sync(struct cx18 *cx, u32 val, u32 reg)
{
	if (cx18_retry_mmio)
		return cx18_write_reg_sync_retry(cx, val, reg);

	return cx18_write_reg_sync_noretry(cx, val, reg);
}


/* Access "encoder memory" region of CX23418 memory mapped I/O */
static inline void cx18_write_enc_noretry(struct cx18 *cx, u32 val, u32 addr)
{
	cx18_writel_noretry(cx, val, cx->enc_mem + addr);
}

static inline void cx18_write_enc_retry(struct cx18 *cx, u32 val, u32 addr)
{
	cx18_writel_retry(cx, val, cx->enc_mem + addr);
}

static inline void cx18_write_enc(struct cx18 *cx, u32 val, u32 addr)
{
	if (cx18_retry_mmio)
		cx18_write_enc_retry(cx, val, addr);
	else
		cx18_write_enc_noretry(cx, val, addr);
}


static inline u32 cx18_read_enc_noretry(struct cx18 *cx, u32 addr)
{
	return cx18_readl_noretry(cx, cx->enc_mem + addr);
}

static inline u32 cx18_read_enc_retry(struct cx18 *cx, u32 addr)
{
	return cx18_readl_retry(cx, cx->enc_mem + addr);
}

static inline u32 cx18_read_enc(struct cx18 *cx, u32 addr)
{
	if (cx18_retry_mmio)
		return cx18_read_enc_retry(cx, addr);

	return cx18_read_enc_noretry(cx, addr);
}

static inline
u32 cx18_write_enc_sync_noretry(struct cx18 *cx, u32 val, u32 addr)
{
	return cx18_write_sync_noretry(cx, val, cx->enc_mem + addr);
}

static inline
u32 cx18_write_enc_sync_retry(struct cx18 *cx, u32 val, u32 addr)
{
	return cx18_write_sync_retry(cx, val, cx->enc_mem + addr);
}

static inline
u32 cx18_write_enc_sync(struct cx18 *cx, u32 val, u32 addr)
{
	if (cx18_retry_mmio)
		return cx18_write_enc_sync_retry(cx, val, addr);

	return cx18_write_enc_sync_noretry(cx, val, 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_setup_page(struct cx18 *cx, u32 addr);

#endif /* CX18_IO_H */