include/linux/mmc/host.h

   1 /*
   2  *  linux/include/linux/mmc/host.h
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *  Host driver specific definitions.
   9  */
  10 #ifndef LINUX_MMC_HOST_H
  11 #define LINUX_MMC_HOST_H
  12
  13 #include <linux/mmc/mmc.h>
  14
  15 struct mmc_ios {
  16         unsigned int    clock;                  /* clock rate */
  17         unsigned short  vdd;
  18
  19 #define MMC_VDD_150     0
  20 #define MMC_VDD_155     1
  21 #define MMC_VDD_160     2
  22 #define MMC_VDD_165     3
  23 #define MMC_VDD_170     4
  24 #define MMC_VDD_180     5
  25 #define MMC_VDD_190     6
  26 #define MMC_VDD_200     7
  27 #define MMC_VDD_210     8
  28 #define MMC_VDD_220     9
  29 #define MMC_VDD_230     10
  30 #define MMC_VDD_240     11
  31 #define MMC_VDD_250     12
  32 #define MMC_VDD_260     13
  33 #define MMC_VDD_270     14
  34 #define MMC_VDD_280     15
  35 #define MMC_VDD_290     16
  36 #define MMC_VDD_300     17
  37 #define MMC_VDD_310     18
  38 #define MMC_VDD_320     19
  39 #define MMC_VDD_330     20
  40 #define MMC_VDD_340     21
  41 #define MMC_VDD_350     22
  42 #define MMC_VDD_360     23
  43
  44         unsigned char   bus_mode;               /* command output mode */
  45
  46 #define MMC_BUSMODE_OPENDRAIN   1
  47 #define MMC_BUSMODE_PUSHPULL    2
  48
  49         unsigned char   chip_select;            /* SPI chip select */
  50
  51 #define MMC_CS_DONTCARE         0
  52 #define MMC_CS_HIGH             1
  53 #define MMC_CS_LOW              2
  54
  55         unsigned char   power_mode;             /* power supply mode */
  56
  57 #define MMC_POWER_OFF           0
  58 #define MMC_POWER_UP            1
  59 #define MMC_POWER_ON            2
  60
  61         unsigned char   bus_width;              /* data bus width */
  62
  63 #define MMC_BUS_WIDTH_1         0
  64 #define MMC_BUS_WIDTH_4         2
  65 };
  66
  67 struct mmc_host_ops {
  68         void    (*request)(struct mmc_host *host, struct mmc_request *req);
  69         void    (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
  70         int     (*get_ro)(struct mmc_host *host);
  71 };
  72
  73 struct mmc_card;
  74 struct device;
  75
  76 struct mmc_host {
  77         struct device           *parent;
  78         struct device           class_dev;
  79         int                     index;
  80         const struct mmc_host_ops *ops;
  81         unsigned int            f_min;
  82         unsigned int            f_max;
  83         u32                     ocr_avail;
  84
  85         unsigned long           caps;           /* Host capabilities */
  86
  87 #define MMC_CAP_4_BIT_DATA      (1 << 0)        /* Can the host do 4 bit transfers */
  88 #define MMC_CAP_MULTIWRITE      (1 << 1)        /* Can accurately report bytes sent to card on error */
  89 #define MMC_CAP_BYTEBLOCK       (1 << 2)        /* Can do non-log2 block sizes */
  90
  91         /* host specific block data */
  92         unsigned int            max_seg_size;   /* see blk_queue_max_segment_size */
  93         unsigned short          max_hw_segs;    /* see blk_queue_max_hw_segments */
  94         unsigned short          max_phys_segs;  /* see blk_queue_max_phys_segments */
  95         unsigned short          unused;
  96         unsigned int            max_req_size;   /* maximum number of bytes in one req */
  97         unsigned int            max_blk_size;   /* maximum size of one mmc block */
  98         unsigned int            max_blk_count;  /* maximum number of blocks in one req */
  99
 100         /* private data */
 101         struct mmc_ios          ios;            /* current io bus settings */
 102         u32                     ocr;            /* the current OCR setting */
 103
 104         unsigned int            mode;           /* current card mode of host */
 105 #define MMC_MODE_MMC            0
 106 #define MMC_MODE_SD             1
 107
 108         struct list_head        cards;          /* devices attached to this host */
 109
 110         wait_queue_head_t       wq;
 111         spinlock_t              lock;           /* claimed lock */
 112         unsigned int            claimed:1;      /* host exclusively claimed */
 113
 114         struct mmc_card         *card_selected; /* the selected MMC card */
 115
 116         struct delayed_work     detect;
 117
 118         unsigned long           private[0] ____cacheline_aligned;
 119 };
 120
 121 extern struct mmc_host *mmc_alloc_host(int extra, struct device *);
 122 extern int mmc_add_host(struct mmc_host *);
 123 extern void mmc_remove_host(struct mmc_host *);
 124 extern void mmc_free_host(struct mmc_host *);
 125
 126 static inline void *mmc_priv(struct mmc_host *host)
 127 {
 128         return (void *)host->private;
 129 }
 130
 131 #define mmc_dev(x)      ((x)->parent)
 132 #define mmc_classdev(x) (&(x)->class_dev)
 133 #define mmc_hostname(x) ((x)->class_dev.bus_id)
 134
 135 extern int mmc_suspend_host(struct mmc_host *, pm_message_t);
 136 extern int mmc_resume_host(struct mmc_host *);
 137
 138 extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
 139 extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
 140
 141 #endif
 142