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
  18 struct sdhci_pltfm_data {
  19         struct sdhci_ops *ops;
  20         unsigned int quirks;
  21 };
  22
  23 struct sdhci_pltfm_host {
  24         struct clk *clk;
  25         void *priv; /* to handle quirks across io-accessor calls */
  26
  27         /* migrate from sdhci_of_host */
  28         unsigned int clock;
  29         u16 xfer_mode_shadow;
  30 };
  31
  32 #ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
  33 /*
  34  * These accessors are designed for big endian hosts doing I/O to
  35  * little endian controllers incorporating a 32-bit hardware byte swapper.
  36  */
  37 static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  38 {
  39         return in_be32(host->ioaddr + reg);
  40 }
  41
  42 static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  43 {
  44         return in_be16(host->ioaddr + (reg ^ 0x2));
  45 }
  46
  47 static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  48 {
  49         return in_8(host->ioaddr + (reg ^ 0x3));
  50 }
  51
  52 static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  53                                        u32 val, int reg)
  54 {
  55         out_be32(host->ioaddr + reg, val);
  56 }
  57
  58 static inline void sdhci_be32bs_writew(struct sdhci_host *host,
  59                                        u16 val, int reg)
  60 {
  61         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  62         int base = reg & ~0x3;
  63         int shift = (reg & 0x2) * 8;
  64
  65         switch (reg) {
  66         case SDHCI_TRANSFER_MODE:
  67                 /*
  68                  * Postpone this write, we must do it together with a
  69                  * command write that is down below.
  70                  */
  71                 pltfm_host->xfer_mode_shadow = val;
  72                 return;
  73         case SDHCI_COMMAND:
  74                 sdhci_be32bs_writel(host,
  75                                     val << 16 | pltfm_host->xfer_mode_shadow,
  76                                     SDHCI_TRANSFER_MODE);
  77                 return;
  78         }
  79         clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
  80 }
  81
  82 static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
  83 {
  84         int base = reg & ~0x3;
  85         int shift = (reg & 0x3) * 8;
  86
  87         clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
  88 }
  89 #endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
  90
  91 extern void sdhci_get_of_property(struct platform_device *pdev);
  92
  93 extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  94                                            struct sdhci_pltfm_data *pdata);
  95 extern void sdhci_pltfm_free(struct platform_device *pdev);
  96
  97 extern int sdhci_pltfm_register(struct platform_device *pdev,
  98                                 struct sdhci_pltfm_data *pdata);
  99 extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 100
 101 #ifdef CONFIG_PM
 102 extern const struct dev_pm_ops sdhci_pltfm_pmops;
 103 #define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
 104 #else
 105 #define SDHCI_PLTFM_PMOPS NULL
 106 #endif
 107
 108 #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */