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         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  */
  40 static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  41 {
  42         return in_be32(host->ioaddr + reg);
  43 }
  44
  45 static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  46 {
  47         return in_be16(host->ioaddr + (reg ^ 0x2));
  48 }
  49
  50 static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  51 {
  52         return in_8(host->ioaddr + (reg ^ 0x3));
  53 }
  54
  55 static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  56                                        u32 val, int reg)
  57 {
  58         out_be32(host->ioaddr + reg, val);
  59 }
  60
  61 static 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
  85 static 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
  94 extern void sdhci_get_of_property(struct platform_device *pdev);
  95
  96 extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  97                                           const struct sdhci_pltfm_data *pdata,
  98                                           size_t priv_size);
  99 extern void sdhci_pltfm_free(struct platform_device *pdev);
 100
 101 extern int sdhci_pltfm_register(struct platform_device *pdev,
 102                                 const struct sdhci_pltfm_data *pdata,
 103                                 size_t priv_size);
 104 extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 105
 106 extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 107
 108 static inline void *sdhci_pltfm_priv(struct sdhci_pltfm_host *host)
 109 {
 110         return (void *)host->private;
 111 }
 112
 113 #ifdef CONFIG_PM
 114 extern const struct dev_pm_ops sdhci_pltfm_pmops;
 115 #define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
 116 #else
 117 #define SDHCI_PLTFM_PMOPS NULL
 118 #endif
 119
 120 #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */