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        void *priv; /* to handle quirks across io-accessor calls */
  27
  28        /* migrate from sdhci_of_host */
  29        unsigned int clock;
  30        u16 xfer_mode_shadow;
  31
  32        unsigned long private[0] ____cacheline_aligned;
  33};
  34
  35#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
  36/*
  37 * These accessors are designed for big endian hosts doing I/O to
  38 * little endian controllers incorporating a 32-bit hardware byte swapper.
  39 */
  40static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  41{
  42        return in_be32(host->ioaddr + reg);
  43}
  44
  45static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  46{
  47        return in_be16(host->ioaddr + (reg ^ 0x2));
  48}
  49
  50static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  51{
  52        return in_8(host->ioaddr + (reg ^ 0x3));
  53}
  54
  55static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  56                                       u32 val, int reg)
  57{
  58        out_be32(host->ioaddr + reg, val);
  59}
  60
  61static inline void sdhci_be32bs_writew(struct sdhci_host *host,
  62                                       u16 val, int reg)
  63{
  64        struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  65        int base = reg & ~0x3;
  66        int shift = (reg & 0x2) * 8;
  67
  68        switch (reg) {
  69        case SDHCI_TRANSFER_MODE:
  70                /*
  71                 * Postpone this write, we must do it together with a
  72                 * command write that is down below.
  73                 */
  74                pltfm_host->xfer_mode_shadow = val;
  75                return;
  76        case SDHCI_COMMAND:
  77                sdhci_be32bs_writel(host,
  78                                    val << 16 | pltfm_host->xfer_mode_shadow,
  79                                    SDHCI_TRANSFER_MODE);
  80                return;
  81        }
  82        clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
  83}
  84
  85static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
  86{
  87        int base = reg & ~0x3;
  88        int shift = (reg & 0x3) * 8;
  89
  90        clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
  91}
  92#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
  93
  94extern void sdhci_get_of_property(struct platform_device *pdev);
  95
  96extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  97                                          const struct sdhci_pltfm_data *pdata,
  98                                          size_t priv_size);
  99extern void sdhci_pltfm_free(struct platform_device *pdev);
 100
 101extern int sdhci_pltfm_register(struct platform_device *pdev,
 102                                const struct sdhci_pltfm_data *pdata,
 103                                size_t priv_size);
 104extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 105
 106extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 107
 108static inline void *sdhci_pltfm_priv(struct sdhci_pltfm_host *host)
 109{
 110        return (void *)host->private;
 111}
 112
 113#ifdef CONFIG_PM
 114extern int sdhci_pltfm_suspend(struct device *dev);
 115extern int sdhci_pltfm_resume(struct device *dev);
 116extern const struct dev_pm_ops sdhci_pltfm_pmops;
 117#define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
 118#else
 119#define SDHCI_PLTFM_PMOPS NULL
 120#endif
 121
 122#endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */
 123