include/linux/mmc/core.h

   1 /*
   2  *  linux/include/linux/mmc/core.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 #ifndef LINUX_MMC_CORE_H
   9 #define LINUX_MMC_CORE_H
  10
  11 #include <linux/interrupt.h>
  12 #include <linux/completion.h>
  13
  14 struct request;
  15 struct mmc_data;
  16 struct mmc_request;
  17
  18 struct mmc_command {
  19         u32                     opcode;
  20         u32                     arg;
  21 #define MMC_CMD23_ARG_REL_WR    (1 << 31)
  22 #define MMC_CMD23_ARG_PACKED    ((0 << 31) | (1 << 30))
  23 #define MMC_CMD23_ARG_TAG_REQ   (1 << 29)
  24         u32                     resp[4];
  25         unsigned int            flags;          /* expected response type */
  26 #define MMC_RSP_PRESENT (1 << 0)
  27 #define MMC_RSP_136     (1 << 1)                /* 136 bit response */
  28 #define MMC_RSP_CRC     (1 << 2)                /* expect valid crc */
  29 #define MMC_RSP_BUSY    (1 << 3)                /* card may send busy */
  30 #define MMC_RSP_OPCODE  (1 << 4)                /* response contains opcode */
  31
  32 #define MMC_CMD_MASK    (3 << 5)                /* non-SPI command type */
  33 #define MMC_CMD_AC      (0 << 5)
  34 #define MMC_CMD_ADTC    (1 << 5)
  35 #define MMC_CMD_BC      (2 << 5)
  36 #define MMC_CMD_BCR     (3 << 5)
  37
  38 #define MMC_RSP_SPI_S1  (1 << 7)                /* one status byte */
  39 #define MMC_RSP_SPI_S2  (1 << 8)                /* second byte */
  40 #define MMC_RSP_SPI_B4  (1 << 9)                /* four data bytes */
  41 #define MMC_RSP_SPI_BUSY (1 << 10)              /* card may send busy */
  42
  43 /*
  44  * These are the native response types, and correspond to valid bit
  45  * patterns of the above flags.  One additional valid pattern
  46  * is all zeros, which means we don't expect a response.
  47  */
  48 #define MMC_RSP_NONE    (0)
  49 #define MMC_RSP_R1      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  50 #define MMC_RSP_R1B     (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
  51 #define MMC_RSP_R2      (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
  52 #define MMC_RSP_R3      (MMC_RSP_PRESENT)
  53 #define MMC_RSP_R4      (MMC_RSP_PRESENT)
  54 #define MMC_RSP_R5      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  55 #define MMC_RSP_R6      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  56 #define MMC_RSP_R7      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  57
  58 #define mmc_resp_type(cmd)      ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
  59
  60 /*
  61  * These are the SPI response types for MMC, SD, and SDIO cards.
  62  * Commands return R1, with maybe more info.  Zero is an error type;
  63  * callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
  64  */
  65 #define MMC_RSP_SPI_R1  (MMC_RSP_SPI_S1)
  66 #define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
  67 #define MMC_RSP_SPI_R2  (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  68 #define MMC_RSP_SPI_R3  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  69 #define MMC_RSP_SPI_R4  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  70 #define MMC_RSP_SPI_R5  (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  71 #define MMC_RSP_SPI_R7  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  72
  73 #define mmc_spi_resp_type(cmd)  ((cmd)->flags & \
  74                 (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4))
  75
  76 /*
  77  * These are the command types.
  78  */
  79 #define mmc_cmd_type(cmd)       ((cmd)->flags & MMC_CMD_MASK)
  80
  81         unsigned int            retries;        /* max number of retries */
  82         int                     error;          /* command error */
  83
  84 /*
  85  * Standard errno values are used for errors, but some have specific
  86  * meaning in the MMC layer:
  87  *
  88  * ETIMEDOUT    Card took too long to respond
  89  * EILSEQ       Basic format problem with the received or sent data
  90  *              (e.g. CRC check failed, incorrect opcode in response
  91  *              or bad end bit)
  92  * EINVAL       Request cannot be performed because of restrictions
  93  *              in hardware and/or the driver
  94  * ENOMEDIUM    Host can determine that the slot is empty and is
  95  *              actively failing requests
  96  */
  97
  98         unsigned int            busy_timeout;   /* busy detect timeout in ms */
  99         /* Set this flag only for blocking sanitize request */
 100         bool                    sanitize_busy;
 101
 102         struct mmc_data         *data;          /* data segment associated with cmd */
 103         struct mmc_request      *mrq;           /* associated request */
 104 };
 105
 106 struct mmc_data {
 107         unsigned int            timeout_ns;     /* data timeout (in ns, max 80ms) */
 108         unsigned int            timeout_clks;   /* data timeout (in clocks) */
 109         unsigned int            blksz;          /* data block size */
 110         unsigned int            blocks;         /* number of blocks */
 111         int                     error;          /* data error */
 112         unsigned int            flags;
 113
 114 #define MMC_DATA_WRITE  (1 << 8)
 115 #define MMC_DATA_READ   (1 << 9)
 116
 117         unsigned int            bytes_xfered;
 118
 119         struct mmc_command      *stop;          /* stop command */
 120         struct mmc_request      *mrq;           /* associated request */
 121
 122         unsigned int            sg_len;         /* size of scatter list */
 123         int                     sg_count;       /* mapped sg entries */
 124         struct scatterlist      *sg;            /* I/O scatter list */
 125         s32                     host_cookie;    /* host private data */
 126 };
 127
 128 struct mmc_host;
 129 struct mmc_request {
 130         struct mmc_command      *sbc;           /* SET_BLOCK_COUNT for multiblock */
 131         struct mmc_command      *cmd;
 132         struct mmc_data         *data;
 133         struct mmc_command      *stop;
 134
 135         struct completion       completion;
 136         struct completion       cmd_completion;
 137         void                    (*done)(struct mmc_request *);/* completion function */
 138         struct mmc_host         *host;
 139
 140         /* Allow other commands during this ongoing data transfer or busy wait */
 141         bool                    cap_cmd_during_tfr;
 142 };
 143
 144 struct mmc_card;
 145 struct mmc_async_req;
 146
 147 extern int mmc_stop_bkops(struct mmc_card *);
 148 extern int mmc_read_bkops_status(struct mmc_card *);
 149 extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
 150                                            struct mmc_async_req *, int *);
 151 extern int mmc_interrupt_hpi(struct mmc_card *);
 152 extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
 153 extern void mmc_wait_for_req_done(struct mmc_host *host,
 154                                   struct mmc_request *mrq);
 155 extern bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq);
 156 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
 157 extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
 158 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
 159         struct mmc_command *, int);
 160 extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
 161 extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
 162 extern int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
 163 extern int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
 164
 165 #define MMC_ERASE_ARG           0x00000000
 166 #define MMC_SECURE_ERASE_ARG    0x80000000
 167 #define MMC_TRIM_ARG            0x00000001
 168 #define MMC_DISCARD_ARG         0x00000003
 169 #define MMC_SECURE_TRIM1_ARG    0x80000001
 170 #define MMC_SECURE_TRIM2_ARG    0x80008000
 171
 172 #define MMC_SECURE_ARGS         0x80000000
 173 #define MMC_TRIM_ARGS           0x00008001
 174
 175 extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
 176                      unsigned int arg);
 177 extern int mmc_can_erase(struct mmc_card *card);
 178 extern int mmc_can_trim(struct mmc_card *card);
 179 extern int mmc_can_discard(struct mmc_card *card);
 180 extern int mmc_can_sanitize(struct mmc_card *card);
 181 extern int mmc_can_secure_erase_trim(struct mmc_card *card);
 182 extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
 183                                    unsigned int nr);
 184 extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
 185
 186 extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
 187 extern int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
 188                               bool is_rel_write);
 189 extern int mmc_hw_reset(struct mmc_host *host);
 190 extern int mmc_can_reset(struct mmc_card *card);
 191
 192 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);
 193 extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int);
 194
 195 extern int __mmc_claim_host(struct mmc_host *host, atomic_t *abort);
 196 extern void mmc_release_host(struct mmc_host *host);
 197
 198 extern void mmc_get_card(struct mmc_card *card);
 199 extern void mmc_put_card(struct mmc_card *card);
 200
 201 extern int mmc_flush_cache(struct mmc_card *);
 202
 203 extern int mmc_detect_card_removed(struct mmc_host *host);
 204
 205 /**
 206  *      mmc_claim_host - exclusively claim a host
 207  *      @host: mmc host to claim
 208  *
 209  *      Claim a host for a set of operations.
 210  */
 211 static inline void mmc_claim_host(struct mmc_host *host)
 212 {
 213         __mmc_claim_host(host, NULL);
 214 }
 215
 216 struct device_node;
 217 extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
 218 extern int mmc_of_parse_voltage(struct device_node *np, u32 *mask);
 219
 220 #endif /* LINUX_MMC_CORE_H */