drivers/mmc/host/sdhci-pltfm.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright 2010 MontaVista Software, LLC.
   4  *
   5  * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
   6  */
   7
   8 #ifndef _DRIVERS_MMC_SDHCI_PLTFM_H
   9 #define _DRIVERS_MMC_SDHCI_PLTFM_H
  10
  11 #include <linux/clk.h>
  12 #include <linux/platform_device.h>
  13 #include "sdhci.h"
  14
  15 struct sdhci_pltfm_data {
  16         const struct sdhci_ops *ops;
  17         unsigned int quirks;
  18         unsigned int quirks2;
  19 };
  20
  21 struct sdhci_pltfm_host {
  22         struct clk *clk;
  23
  24         /* migrate from sdhci_of_host */
  25         unsigned int clock;
  26         u16 xfer_mode_shadow;
  27
  28         unsigned long private[] ____cacheline_aligned;
  29 };
  30
  31 #ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
  32 /*
  33  * These accessors are designed for big endian hosts doing I/O to
  34  * little endian controllers incorporating a 32-bit hardware byte swapper.
  35  */
  36 static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
  37 {
  38         return in_be32(host->ioaddr + reg);
  39 }
  40
  41 static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
  42 {
  43         return in_be16(host->ioaddr + (reg ^ 0x2));
  44 }
  45
  46 static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
  47 {
  48         return in_8(host->ioaddr + (reg ^ 0x3));
  49 }
  50
  51 static inline void sdhci_be32bs_writel(struct sdhci_host *host,
  52                                        u32 val, int reg)
  53 {
  54         out_be32(host->ioaddr + reg, val);
  55 }
  56
  57 static inline void sdhci_be32bs_writew(struct sdhci_host *host,
  58                                        u16 val, int reg)
  59 {
  60         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  61         int base = reg & ~0x3;
  62         int shift = (reg & 0x2) * 8;
  63
  64         switch (reg) {
  65         case SDHCI_TRANSFER_MODE:
  66                 /*
  67                  * Postpone this write, we must do it together with a
  68                  * command write that is down below.
  69                  */
  70                 pltfm_host->xfer_mode_shadow = val;
  71                 return;
  72         case SDHCI_COMMAND:
  73                 sdhci_be32bs_writel(host,
  74                                     val << 16 | pltfm_host->xfer_mode_shadow,
  75                                     SDHCI_TRANSFER_MODE);
  76                 return;
  77         }
  78         clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
  79 }
  80
  81 static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
  82 {
  83         int base = reg & ~0x3;
  84         int shift = (reg & 0x3) * 8;
  85
  86         clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
  87 }
  88 #endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
  89
  90 void sdhci_get_property(struct platform_device *pdev);
  91
  92 static inline void sdhci_get_of_property(struct platform_device *pdev)
  93 {
  94         return sdhci_get_property(pdev);
  95 }
  96
  97 extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
  98                                           const struct sdhci_pltfm_data *pdata,
  99                                           size_t priv_size);
 100 extern void sdhci_pltfm_free(struct platform_device *pdev);
 101
 102 extern int sdhci_pltfm_register(struct platform_device *pdev,
 103                                 const struct sdhci_pltfm_data *pdata,
 104                                 size_t priv_size);
 105 extern int sdhci_pltfm_unregister(struct platform_device *pdev);
 106
 107 extern unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host);
 108
 109 static inline void *sdhci_pltfm_priv(struct sdhci_pltfm_host *host)
 110 {
 111         return host->private;
 112 }
 113
 114 int sdhci_pltfm_suspend(struct device *dev);
 115 int sdhci_pltfm_resume(struct device *dev);
 116 extern const struct dev_pm_ops sdhci_pltfm_pmops;
 117
 118 #endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */