linux/drivers/mmc/host/sdhci-pltfm.h
Shawn Guo f0de836923 mmc: sdhci: change sdhci-pltfm into a module
There are a couple of problems left from the sdhci pltfm and OF
consolidation changes.

* When building more than one sdhci-pltfm based drivers in the same
  image, linker will give multiple definition error on the sdhci-pltfm
  helper functions.  For example right now, building sdhci-of-esdhc
  and sdhci-of-hlwd together is a valid combination from Kconfig view.

* With the current build method, there is error with building the
  drivers as module, but module installation fails with modprobe.

The patch fixes above problems by changing sdhci-pltfm into a module.
To avoid EXPORT_SYMBOL on so many big endian IO accessors, it moves
these accessors into sdhci-pltfm.h as the 'static inline' functions.
As a result, sdhci.h needs to be included in sdhci-pltfm.h, and in
turn can be removed from individual drivers which already include
sdhci-pltfm.h.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-20 17:20:49 -04:00

107 lines
2.8 KiB
C

/*
* Copyright 2010 MontaVista Software, LLC.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
* 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.
*/
#ifndef _DRIVERS_MMC_SDHCI_PLTFM_H
#define _DRIVERS_MMC_SDHCI_PLTFM_H
#include <linux/clk.h>
#include <linux/platform_device.h>
#include "sdhci.h"
struct sdhci_pltfm_data {
struct sdhci_ops *ops;
unsigned int quirks;
};
struct sdhci_pltfm_host {
struct clk *clk;
void *priv; /* to handle quirks across io-accessor calls */
/* migrate from sdhci_of_host */
unsigned int clock;
u16 xfer_mode_shadow;
};
#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
/*
* These accessors are designed for big endian hosts doing I/O to
* little endian controllers incorporating a 32-bit hardware byte swapper.
*/
static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
{
return in_be32(host->ioaddr + reg);
}
static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
{
return in_be16(host->ioaddr + (reg ^ 0x2));
}
static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
{
return in_8(host->ioaddr + (reg ^ 0x3));
}
static inline void sdhci_be32bs_writel(struct sdhci_host *host,
u32 val, int reg)
{
out_be32(host->ioaddr + reg, val);
}
static inline void sdhci_be32bs_writew(struct sdhci_host *host,
u16 val, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
int base = reg & ~0x3;
int shift = (reg & 0x2) * 8;
switch (reg) {
case SDHCI_TRANSFER_MODE:
/*
* Postpone this write, we must do it together with a
* command write that is down below.
*/
pltfm_host->xfer_mode_shadow = val;
return;
case SDHCI_COMMAND:
sdhci_be32bs_writel(host,
val << 16 | pltfm_host->xfer_mode_shadow,
SDHCI_TRANSFER_MODE);
return;
}
clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
}
static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
{
int base = reg & ~0x3;
int shift = (reg & 0x3) * 8;
clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
}
#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
extern void sdhci_get_of_property(struct platform_device *pdev);
extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
struct sdhci_pltfm_data *pdata);
extern void sdhci_pltfm_free(struct platform_device *pdev);
extern int sdhci_pltfm_register(struct platform_device *pdev,
struct sdhci_pltfm_data *pdata);
extern int sdhci_pltfm_unregister(struct platform_device *pdev);
#ifdef CONFIG_PM
extern int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state);
extern int sdhci_pltfm_resume(struct platform_device *dev);
#endif
#endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */