arch/arm/plat-s3c/include/plat/sdhci.h

   1 /* linux/arch/arm/plat-s3c/include/plat/sdhci.h
   2  *
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      http://armlinux.simtec.co.uk/
   6  *      Ben Dooks <ben@simtec.co.uk>
   7  *
   8  * S3C Platform - SDHCI (HSMMC) platform data definitions
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #ifndef __PLAT_S3C_SDHCI_H
  16 #define __PLAT_S3C_SDHCI_H __FILE__
  17
  18 struct platform_device;
  19 struct mmc_host;
  20 struct mmc_card;
  21 struct mmc_ios;
  22
  23 /**
  24  * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI
  25  * @max_width: The maximum number of data bits supported.
  26  * @host_caps: Standard MMC host capabilities bit field.
  27  * @cfg_gpio: Configure the GPIO for a specific card bit-width
  28  * @cfg_card: Configure the interface for a specific card and speed. This
  29  *            is necessary the controllers and/or GPIO blocks require the
  30  *            changing of driver-strength and other controls dependant on
  31  *            the card and speed of operation.
  32  *
  33  * Initialisation data specific to either the machine or the platform
  34  * for the device driver to use or call-back when configuring gpio or
  35  * card speed information.
  36 */
  37 struct s3c_sdhci_platdata {
  38         unsigned int    max_width;
  39         unsigned int    host_caps;
  40
  41         char            **clocks;       /* set of clock sources */
  42
  43         void    (*cfg_gpio)(struct platform_device *dev, int width);
  44         void    (*cfg_card)(struct platform_device *dev,
  45                             void __iomem *regbase,
  46                             struct mmc_ios *ios,
  47                             struct mmc_card *card);
  48 };
  49
  50 /**
  51  * s3c_sdhci0_set_platdata - Set platform data for S3C SDHCI device.
  52  * @pd: Platform data to register to device.
  53  *
  54  * Register the given platform data for use withe S3C SDHCI device.
  55  * The call will copy the platform data, so the board definitions can
  56  * make the structure itself __initdata.
  57  */
  58 extern void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd);
  59
  60 /* Default platform data, exported so that per-cpu initialisation can
  61  * set the correct one when there are more than one cpu type selected.
  62 */
  63
  64 extern struct s3c_sdhci_platdata s3c_hsmmc0_def_platata;
  65
  66 /* Helper function availablity */
  67
  68 #ifdef CONFIG_S3C6410_SETUP_SDHCI
  69 extern char *s3c6410_hsmmc_clksrcs[4];
  70
  71 extern void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
  72 extern void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,
  73                                            void __iomem *r,
  74                                            struct mmc_ios *ios,
  75                                            struct mmc_card *card);
  76
  77 static inline void s3c6410_default_sdhci0(void)
  78 {
  79         s3c_hsmmc0_def_platdata.clocks = s3c6410_hsmmc_clksrcs;
  80         s3c_hsmmc0_def_platdata.cfg_gpio = s3c6410_setup_sdhci0_cfg_gpio;
  81         s3c_hsmmc0_def_platdata.cfg_card = s3c6410_setup_sdhci0_cfg_card;
  82 }
  83 #else
  84 static inline void s3c6410_default_sdhci0(void) { }
  85 #endif /* CONFIG_S3C6410_SETUP_SDHCI */
  86
  87 #endif /* __PLAT_S3C_SDHCI_H */