arch/arm/plat-omap/include/plat/mmc.h

   1 /*
   2  * MMC definitions for OMAP2
   3  *
   4  * Copyright (C) 2006 Nokia Corporation
   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 __OMAP2_MMC_H
  12 #define __OMAP2_MMC_H
  13
  14 #include <linux/types.h>
  15 #include <linux/device.h>
  16 #include <linux/mmc/host.h>
  17
  18 #include <plat/board.h>
  19 #include <plat/omap_hwmod.h>
  20
  21 #define OMAP15XX_NR_MMC         1
  22 #define OMAP16XX_NR_MMC         2
  23 #define OMAP1_MMC_SIZE          0x080
  24 #define OMAP1_MMC1_BASE         0xfffb7800
  25 #define OMAP1_MMC2_BASE         0xfffb7c00      /* omap16xx only */
  26
  27 #define OMAP24XX_NR_MMC         2
  28 #define OMAP2420_MMC_SIZE       OMAP1_MMC_SIZE
  29 #define OMAP2_MMC1_BASE         0x4809c000
  30
  31 #define OMAP4_MMC_REG_OFFSET    0x100
  32
  33 #define OMAP_MMC_MAX_SLOTS      2
  34
  35 /*
  36  * struct omap_mmc_dev_attr.flags possibilities
  37  *
  38  * OMAP_HSMMC_SUPPORTS_DUAL_VOLT: Some HSMMC controller instances can
  39  *    operate with either 1.8Vdc or 3.0Vdc card voltages; this flag
  40  *    should be set if this is the case.  See for example Section 22.5.3
  41  *    "MMC/SD/SDIO1 Bus Voltage Selection" of the OMAP34xx Multimedia
  42  *    Device Silicon Revision 3.1.x Revision ZR (July 2011) (SWPU223R).
  43  *
  44  * OMAP_HSMMC_BROKEN_MULTIBLOCK_READ: Multiple-block read transfers
  45  *    don't work correctly on some MMC controller instances on some
  46  *    OMAP3 SoCs; this flag should be set if this is the case.  See
  47  *    for example Advisory 2.1.1.128 "MMC: Multiple Block Read
  48  *    Operation Issue" in _OMAP3530/3525/3515/3503 Silicon Errata_
  49  *    Revision F (October 2010) (SPRZ278F).
  50  */
  51 #define OMAP_HSMMC_SUPPORTS_DUAL_VOLT           BIT(0)
  52 #define OMAP_HSMMC_BROKEN_MULTIBLOCK_READ       BIT(1)
  53
  54 struct omap_mmc_dev_attr {
  55         u8 flags;
  56 };
  57
  58 struct omap_mmc_platform_data {
  59         /* back-link to device */
  60         struct device *dev;
  61
  62         /* number of slots per controller */
  63         unsigned nr_slots:2;
  64
  65         /* set if your board has components or wiring that limits the
  66          * maximum frequency on the MMC bus */
  67         unsigned int max_freq;
  68
  69         /* switch the bus to a new slot */
  70         int (*switch_slot)(struct device *dev, int slot);
  71         /* initialize board-specific MMC functionality, can be NULL if
  72          * not supported */
  73         int (*init)(struct device *dev);
  74         void (*cleanup)(struct device *dev);
  75         void (*shutdown)(struct device *dev);
  76
  77         /* To handle board related suspend/resume functionality for MMC */
  78         int (*suspend)(struct device *dev, int slot);
  79         int (*resume)(struct device *dev, int slot);
  80
  81         /* Return context loss count due to PM states changing */
  82         int (*get_context_loss_count)(struct device *dev);
  83
  84         /* Integrating attributes from the omap_hwmod layer */
  85         u8 controller_flags;
  86
  87         /* Register offset deviation */
  88         u16 reg_offset;
  89
  90         struct omap_mmc_slot_data {
  91
  92                 /*
  93                  * 4/8 wires and any additional host capabilities
  94                  * need to OR'd all capabilities (ref. linux/mmc/host.h)
  95                  */
  96                 u8  wires;      /* Used for the MMC driver on omap1 and 2420 */
  97                 u32 caps;       /* Used for the MMC driver on 2430 and later */
  98                 u32 pm_caps;    /* PM capabilities of the mmc */
  99
 100                 /*
 101                  * nomux means "standard" muxing is wrong on this board, and
 102                  * that board-specific code handled it before common init logic.
 103                  */
 104                 unsigned nomux:1;
 105
 106                 /* switch pin can be for card detect (default) or card cover */
 107                 unsigned cover:1;
 108
 109                 /* use the internal clock */
 110                 unsigned internal_clock:1;
 111
 112                 /* nonremovable e.g. eMMC */
 113                 unsigned nonremovable:1;
 114
 115                 /* Try to sleep or power off when possible */
 116                 unsigned power_saving:1;
 117
 118                 /* If using power_saving and the MMC power is not to go off */
 119                 unsigned no_off:1;
 120
 121                 /* eMMC does not handle power off when not in sleep state */
 122                 unsigned no_regulator_off_init:1;
 123
 124                 /* Regulator off remapped to sleep */
 125                 unsigned vcc_aux_disable_is_sleep:1;
 126
 127                 /* we can put the features above into this variable */
 128 #define HSMMC_HAS_PBIAS         (1 << 0)
 129 #define HSMMC_HAS_UPDATED_RESET (1 << 1)
 130                 unsigned features;
 131
 132                 int switch_pin;                 /* gpio (card detect) */
 133                 int gpio_wp;                    /* gpio (write protect) */
 134
 135                 int (*set_bus_mode)(struct device *dev, int slot, int bus_mode);
 136                 int (*set_power)(struct device *dev, int slot,
 137                                  int power_on, int vdd);
 138                 int (*get_ro)(struct device *dev, int slot);
 139                 void (*remux)(struct device *dev, int slot, int power_on);
 140                 /* Call back before enabling / disabling regulators */
 141                 void (*before_set_reg)(struct device *dev, int slot,
 142                                        int power_on, int vdd);
 143                 /* Call back after enabling / disabling regulators */
 144                 void (*after_set_reg)(struct device *dev, int slot,
 145                                       int power_on, int vdd);
 146                 /* if we have special card, init it using this callback */
 147                 void (*init_card)(struct mmc_card *card);
 148
 149                 /* return MMC cover switch state, can be NULL if not supported.
 150                  *
 151                  * possible return values:
 152                  *   0 - closed
 153                  *   1 - open
 154                  */
 155                 int (*get_cover_state)(struct device *dev, int slot);
 156
 157                 const char *name;
 158                 u32 ocr_mask;
 159
 160                 /* Card detection IRQs */
 161                 int card_detect_irq;
 162                 int (*card_detect)(struct device *dev, int slot);
 163
 164                 unsigned int ban_openended:1;
 165
 166         } slots[OMAP_MMC_MAX_SLOTS];
 167 };
 168
 169 /* called from board-specific card detection service routine */
 170 extern void omap_mmc_notify_cover_event(struct device *dev, int slot,
 171                                         int is_closed);
 172
 173 #if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
 174 void omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 175                                 int nr_controllers);
 176 void omap242x_init_mmc(struct omap_mmc_platform_data **mmc_data);
 177 #else
 178 static inline void omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 179                                 int nr_controllers)
 180 {
 181 }
 182 static inline void omap242x_init_mmc(struct omap_mmc_platform_data **mmc_data)
 183 {
 184 }
 185 #endif
 186
 187 extern int omap_msdi_reset(struct omap_hwmod *oh);
 188
 189 #endif