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         const struct sdhci_ops *ops;
  20         unsigned int quirks;
  21         unsigned int quirks2;
  22 };
  23
  24 struct 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  */
  39 static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  40 {
  41         return in_be32(host->ioaddr + reg);
  42 }
  43
  44 static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  45 {
  46         return in_be16(host->ioaddr + (reg ^ 0x2));
  47 }
  48
  49 static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  50 {
  51         return in_8(host->ioaddr + (reg ^ 0x3));
  52 }
  53
  54 static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  55                                        u32 val, int reg)
  56 {
  57         out_be32(host->ioaddr + reg, val);
  58 }
  59
  60 static 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
  84 static 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
  93 extern void sdhci_get_of_property(struct platform_device *pdev);
  94
  95 extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  96                                           const struct sdhci_pltfm_data *pdata,
  97                                           size_t priv_size);
  98 extern void sdhci_pltfm_free(struct platform_device *pdev);
  99
 100 extern int sdhci_pltfm_register(struct platform_device *pdev,
 101                                 const struct sdhci_pltfm_data *pdata,
 102                                 size_t priv_size);
 103 extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 104
 105 extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 106
 107 static inline void *sdhci_pltfm_priv(struct sdhci_pltfm_host *host)
 108 {
 109         return host->private;
 110 }
 111
 112 extern const struct dev_pm_ops sdhci_pltfm_pmops;
 113
 114 #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */