LXR linux/drivers/mmc/host/sdhci-pltfm.h

   1/*
   2 * Copyright 2010 MontaVista Software, LLC.
   3 *
   4 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef _DRIVERS_MMC_SDHCI_PLTFM_H
  12#define _DRIVERS_MMC_SDHCI_PLTFM_H
  13
  14#include <linux/clk.h>
  15#include <linux/platform_device.h>
  16#include "sdhci.h"
  17
  18struct sdhci_pltfm_data {
  19        const struct sdhci_ops *ops;
  20        unsigned int quirks;
  21        unsigned int quirks2;
  22};
  23
  24struct sdhci_pltfm_host {
  25        struct clk *clk;
  26
  27        /* migrate from sdhci_of_host */
  28        unsigned int clock;
  29        u16 xfer_mode_shadow;
  30
  31        unsigned long private[0] ____cacheline_aligned;
  32};
  33
  34#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
  35/*
  36 * These accessors are designed for big endian hosts doing I/O to
  37 * little endian controllers incorporating a 32-bit hardware byte swapper.
  38 */
  39static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  40{
  41        return in_be32(host->ioaddr + reg);
  42}
  43
  44static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  45{
  46        return in_be16(host->ioaddr + (reg ^ 0x2));
  47}
  48
  49static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  50{
  51        return in_8(host->ioaddr + (reg ^ 0x3));
  52}
  53
  54static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  55                                       u32 val, int reg)
  56{
  57        out_be32(host->ioaddr + reg, val);
  58}
  59
  60static inline void sdhci_be32bs_writew(struct sdhci_host *host,
  61                                       u16 val, int reg)
  62{
  63        struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  64        int base = reg & ~0x3;
  65        int shift = (reg & 0x2) * 8;
  66
  67        switch (reg) {
  68        case SDHCI_TRANSFER_MODE:
  69                /*
  70                 * Postpone this write, we must do it together with a
  71                 * command write that is down below.
  72                 */
  73                pltfm_host->xfer_mode_shadow = val;
  74                return;
  75        case SDHCI_COMMAND:
  76                sdhci_be32bs_writel(host,
  77                                    val << 16 | pltfm_host->xfer_mode_shadow,
  78                                    SDHCI_TRANSFER_MODE);
  79                return;
  80        }
  81        clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
  82}
  83
  84static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
  85{
  86        int base = reg & ~0x3;
  87        int shift = (reg & 0x3) * 8;
  88
  89        clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
  90}
  91#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
  92
  93extern void sdhci_get_of_property(struct platform_device *pdev);
  94
  95extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  96                                          const struct sdhci_pltfm_data *pdata,
  97                                          size_t priv_size);
  98extern void sdhci_pltfm_free(struct platform_device *pdev);
  99
 100extern int sdhci_pltfm_register(struct platform_device *pdev,
 101                                const struct sdhci_pltfm_data *pdata,
 102                                size_t priv_size);
 103extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 104
 105extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 106
 107static inline void *sdhci_pltfm_priv(struct sdhci_pltfm_host *host)
 108{
 109        return (void *)host->private;
 110}
 111
 112#ifdef CONFIG_PM
 113extern int sdhci_pltfm_suspend(struct device *dev);
 114extern int sdhci_pltfm_resume(struct device *dev);
 115extern const struct dev_pm_ops sdhci_pltfm_pmops;
 116#define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
 117#else
 118#define SDHCI_PLTFM_PMOPS NULL
 119#endif
 120
 121#endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */
 122