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/leds.h>
  14 #include <linux/mutex.h>
  15 #include <linux/sched.h>
  16 #include <linux/device.h>
  17 #include <linux/fault-inject.h>
  18
  19 #include <linux/mmc/core.h>
  20 #include <linux/mmc/card.h>
  21 #include <linux/mmc/pm.h>
  22
  23 struct mmc_ios {
  24         unsigned int    clock;                  /* clock rate */
  25         unsigned short  vdd;
  26
  27 /* vdd stores the bit number of the selected voltage range from below. */
  28
  29         unsigned char   bus_mode;               /* command output mode */
  30
  31 #define MMC_BUSMODE_OPENDRAIN   1
  32 #define MMC_BUSMODE_PUSHPULL    2
  33
  34         unsigned char   chip_select;            /* SPI chip select */
  35
  36 #define MMC_CS_DONTCARE         0
  37 #define MMC_CS_HIGH             1
  38 #define MMC_CS_LOW              2
  39
  40         unsigned char   power_mode;             /* power supply mode */
  41
  42 #define MMC_POWER_OFF           0
  43 #define MMC_POWER_UP            1
  44 #define MMC_POWER_ON            2
  45 #define MMC_POWER_UNDEFINED     3
  46
  47         unsigned char   bus_width;              /* data bus width */
  48
  49 #define MMC_BUS_WIDTH_1         0
  50 #define MMC_BUS_WIDTH_4         2
  51 #define MMC_BUS_WIDTH_8         3
  52
  53         unsigned char   timing;                 /* timing specification used */
  54
  55 #define MMC_TIMING_LEGACY       0
  56 #define MMC_TIMING_MMC_HS       1
  57 #define MMC_TIMING_SD_HS        2
  58 #define MMC_TIMING_UHS_SDR12    3
  59 #define MMC_TIMING_UHS_SDR25    4
  60 #define MMC_TIMING_UHS_SDR50    5
  61 #define MMC_TIMING_UHS_SDR104   6
  62 #define MMC_TIMING_UHS_DDR50    7
  63 #define MMC_TIMING_MMC_DDR52    8
  64 #define MMC_TIMING_MMC_HS200    9
  65 #define MMC_TIMING_MMC_HS400    10
  66
  67         unsigned char   signal_voltage;         /* signalling voltage (1.8V or 3.3V) */
  68
  69 #define MMC_SIGNAL_VOLTAGE_330  0
  70 #define MMC_SIGNAL_VOLTAGE_180  1
  71 #define MMC_SIGNAL_VOLTAGE_120  2
  72
  73         unsigned char   drv_type;               /* driver type (A, B, C, D) */
  74
  75 #define MMC_SET_DRIVER_TYPE_B   0
  76 #define MMC_SET_DRIVER_TYPE_A   1
  77 #define MMC_SET_DRIVER_TYPE_C   2
  78 #define MMC_SET_DRIVER_TYPE_D   3
  79 };
  80
  81 struct mmc_host_ops {
  82         /*
  83          * 'enable' is called when the host is claimed and 'disable' is called
  84          * when the host is released. 'enable' and 'disable' are deprecated.
  85          */
  86         int (*enable)(struct mmc_host *host);
  87         int (*disable)(struct mmc_host *host);
  88         /*
  89          * It is optional for the host to implement pre_req and post_req in
  90          * order to support double buffering of requests (prepare one
  91          * request while another request is active).
  92          * pre_req() must always be followed by a post_req().
  93          * To undo a call made to pre_req(), call post_req() with
  94          * a nonzero err condition.
  95          */
  96         void    (*post_req)(struct mmc_host *host, struct mmc_request *req,
  97                             int err);
  98         void    (*pre_req)(struct mmc_host *host, struct mmc_request *req,
  99                            bool is_first_req);
 100         void    (*request)(struct mmc_host *host, struct mmc_request *req);
 101         /*
 102          * Avoid calling these three functions too often or in a "fast path",
 103          * since underlaying controller might implement them in an expensive
 104          * and/or slow way.
 105          *
 106          * Also note that these functions might sleep, so don't call them
 107          * in the atomic contexts!
 108          *
 109          * Return values for the get_ro callback should be:
 110          *   0 for a read/write card
 111          *   1 for a read-only card
 112          *   -ENOSYS when not supported (equal to NULL callback)
 113          *   or a negative errno value when something bad happened
 114          *
 115          * Return values for the get_cd callback should be:
 116          *   0 for a absent card
 117          *   1 for a present card
 118          *   -ENOSYS when not supported (equal to NULL callback)
 119          *   or a negative errno value when something bad happened
 120          */
 121         void    (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
 122         int     (*get_ro)(struct mmc_host *host);
 123         int     (*get_cd)(struct mmc_host *host);
 124
 125         void    (*enable_sdio_irq)(struct mmc_host *host, int enable);
 126
 127         /* optional callback for HC quirks */
 128         void    (*init_card)(struct mmc_host *host, struct mmc_card *card);
 129
 130         int     (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
 131
 132         /* Check if the card is pulling dat[0:3] low */
 133         int     (*card_busy)(struct mmc_host *host);
 134
 135         /* The tuning command opcode value is different for SD and eMMC cards */
 136         int     (*execute_tuning)(struct mmc_host *host, u32 opcode);
 137
 138         /* Prepare HS400 target operating frequency depending host driver */
 139         int     (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
 140         int     (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
 141         void    (*hw_reset)(struct mmc_host *host);
 142         void    (*card_event)(struct mmc_host *host);
 143
 144         /*
 145          * Optional callback to support controllers with HW issues for multiple
 146          * I/O. Returns the number of supported blocks for the request.
 147          */
 148         int     (*multi_io_quirk)(struct mmc_card *card,
 149                                   unsigned int direction, int blk_size);
 150 };
 151
 152 struct mmc_card;
 153 struct device;
 154
 155 struct mmc_async_req {
 156         /* active mmc request */
 157         struct mmc_request      *mrq;
 158         /*
 159          * Check error status of completed mmc request.
 160          * Returns 0 if success otherwise non zero.
 161          */
 162         int (*err_check) (struct mmc_card *, struct mmc_async_req *);
 163 };
 164
 165 /**
 166  * struct mmc_slot - MMC slot functions
 167  *
 168  * @cd_irq:             MMC/SD-card slot hotplug detection IRQ or -EINVAL
 169  * @lock:               protect the @handler_priv pointer
 170  * @handler_priv:       MMC/SD-card slot context
 171  *
 172  * Some MMC/SD host controllers implement slot-functions like card and
 173  * write-protect detection natively. However, a large number of controllers
 174  * leave these functions to the CPU. This struct provides a hook to attach
 175  * such slot-function drivers.
 176  */
 177 struct mmc_slot {
 178         int cd_irq;
 179         struct mutex lock;
 180         void *handler_priv;
 181 };
 182
 183 /**
 184  * mmc_context_info - synchronization details for mmc context
 185  * @is_done_rcv         wake up reason was done request
 186  * @is_new_req          wake up reason was new request
 187  * @is_waiting_last_req mmc context waiting for single running request
 188  * @wait                wait queue
 189  * @lock                lock to protect data fields
 190  */
 191 struct mmc_context_info {
 192         bool                    is_done_rcv;
 193         bool                    is_new_req;
 194         bool                    is_waiting_last_req;
 195         wait_queue_head_t       wait;
 196         spinlock_t              lock;
 197 };
 198
 199 struct regulator;
 200
 201 struct mmc_supply {
 202         struct regulator *vmmc;         /* Card power supply */
 203         struct regulator *vqmmc;        /* Optional Vccq supply */
 204 };
 205
 206 struct mmc_host {
 207         struct device           *parent;
 208         struct device           class_dev;
 209         int                     index;
 210         const struct mmc_host_ops *ops;
 211         unsigned int            f_min;
 212         unsigned int            f_max;
 213         unsigned int            f_init;
 214         u32                     ocr_avail;
 215         u32                     ocr_avail_sdio; /* SDIO-specific OCR */
 216         u32                     ocr_avail_sd;   /* SD-specific OCR */
 217         u32                     ocr_avail_mmc;  /* MMC-specific OCR */
 218         struct notifier_block   pm_notify;
 219         u32                     max_current_330;
 220         u32                     max_current_300;
 221         u32                     max_current_180;
 222
 223 #define MMC_VDD_165_195         0x00000080      /* VDD voltage 1.65 - 1.95 */
 224 #define MMC_VDD_20_21           0x00000100      /* VDD voltage 2.0 ~ 2.1 */
 225 #define MMC_VDD_21_22           0x00000200      /* VDD voltage 2.1 ~ 2.2 */
 226 #define MMC_VDD_22_23           0x00000400      /* VDD voltage 2.2 ~ 2.3 */
 227 #define MMC_VDD_23_24           0x00000800      /* VDD voltage 2.3 ~ 2.4 */
 228 #define MMC_VDD_24_25           0x00001000      /* VDD voltage 2.4 ~ 2.5 */
 229 #define MMC_VDD_25_26           0x00002000      /* VDD voltage 2.5 ~ 2.6 */
 230 #define MMC_VDD_26_27           0x00004000      /* VDD voltage 2.6 ~ 2.7 */
 231 #define MMC_VDD_27_28           0x00008000      /* VDD voltage 2.7 ~ 2.8 */
 232 #define MMC_VDD_28_29           0x00010000      /* VDD voltage 2.8 ~ 2.9 */
 233 #define MMC_VDD_29_30           0x00020000      /* VDD voltage 2.9 ~ 3.0 */
 234 #define MMC_VDD_30_31           0x00040000      /* VDD voltage 3.0 ~ 3.1 */
 235 #define MMC_VDD_31_32           0x00080000      /* VDD voltage 3.1 ~ 3.2 */
 236 #define MMC_VDD_32_33           0x00100000      /* VDD voltage 3.2 ~ 3.3 */
 237 #define MMC_VDD_33_34           0x00200000      /* VDD voltage 3.3 ~ 3.4 */
 238 #define MMC_VDD_34_35           0x00400000      /* VDD voltage 3.4 ~ 3.5 */
 239 #define MMC_VDD_35_36           0x00800000      /* VDD voltage 3.5 ~ 3.6 */
 240
 241         u32                     caps;           /* Host capabilities */
 242
 243 #define MMC_CAP_4_BIT_DATA      (1 << 0)        /* Can the host do 4 bit transfers */
 244 #define MMC_CAP_MMC_HIGHSPEED   (1 << 1)        /* Can do MMC high-speed timing */
 245 #define MMC_CAP_SD_HIGHSPEED    (1 << 2)        /* Can do SD high-speed timing */
 246 #define MMC_CAP_SDIO_IRQ        (1 << 3)        /* Can signal pending SDIO IRQs */
 247 #define MMC_CAP_SPI             (1 << 4)        /* Talks only SPI protocols */
 248 #define MMC_CAP_NEEDS_POLL      (1 << 5)        /* Needs polling for card-detection */
 249 #define MMC_CAP_8_BIT_DATA      (1 << 6)        /* Can the host do 8 bit transfers */
 250 #define MMC_CAP_AGGRESSIVE_PM   (1 << 7)        /* Suspend (e)MMC/SD at idle  */
 251 #define MMC_CAP_NONREMOVABLE    (1 << 8)        /* Nonremovable e.g. eMMC */
 252 #define MMC_CAP_WAIT_WHILE_BUSY (1 << 9)        /* Waits while card is busy */
 253 #define MMC_CAP_ERASE           (1 << 10)       /* Allow erase/trim commands */
 254 #define MMC_CAP_1_8V_DDR        (1 << 11)       /* can support */
 255                                                 /* DDR mode at 1.8V */
 256 #define MMC_CAP_1_2V_DDR        (1 << 12)       /* can support */
 257                                                 /* DDR mode at 1.2V */
 258 #define MMC_CAP_POWER_OFF_CARD  (1 << 13)       /* Can power off after boot */
 259 #define MMC_CAP_BUS_WIDTH_TEST  (1 << 14)       /* CMD14/CMD19 bus width ok */
 260 #define MMC_CAP_UHS_SDR12       (1 << 15)       /* Host supports UHS SDR12 mode */
 261 #define MMC_CAP_UHS_SDR25       (1 << 16)       /* Host supports UHS SDR25 mode */
 262 #define MMC_CAP_UHS_SDR50       (1 << 17)       /* Host supports UHS SDR50 mode */
 263 #define MMC_CAP_UHS_SDR104      (1 << 18)       /* Host supports UHS SDR104 mode */
 264 #define MMC_CAP_UHS_DDR50       (1 << 19)       /* Host supports UHS DDR50 mode */
 265 #define MMC_CAP_RUNTIME_RESUME  (1 << 20)       /* Resume at runtime_resume. */
 266 #define MMC_CAP_DRIVER_TYPE_A   (1 << 23)       /* Host supports Driver Type A */
 267 #define MMC_CAP_DRIVER_TYPE_C   (1 << 24)       /* Host supports Driver Type C */
 268 #define MMC_CAP_DRIVER_TYPE_D   (1 << 25)       /* Host supports Driver Type D */
 269 #define MMC_CAP_CMD23           (1 << 30)       /* CMD23 supported. */
 270 #define MMC_CAP_HW_RESET        (1 << 31)       /* Hardware reset */
 271
 272         u32                     caps2;          /* More host capabilities */
 273
 274 #define MMC_CAP2_BOOTPART_NOACC (1 << 0)        /* Boot partition no access */
 275 #define MMC_CAP2_FULL_PWR_CYCLE (1 << 2)        /* Can do full power cycle */
 276 #define MMC_CAP2_HS200_1_8V_SDR (1 << 5)        /* can support */
 277 #define MMC_CAP2_HS200_1_2V_SDR (1 << 6)        /* can support */
 278 #define MMC_CAP2_HS200          (MMC_CAP2_HS200_1_8V_SDR | \
 279                                  MMC_CAP2_HS200_1_2V_SDR)
 280 #define MMC_CAP2_HC_ERASE_SZ    (1 << 9)        /* High-capacity erase size */
 281 #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10)       /* Card-detect signal active high */
 282 #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11)       /* Write-protect signal active high */
 283 #define MMC_CAP2_PACKED_RD      (1 << 12)       /* Allow packed read */
 284 #define MMC_CAP2_PACKED_WR      (1 << 13)       /* Allow packed write */
 285 #define MMC_CAP2_PACKED_CMD     (MMC_CAP2_PACKED_RD | \
 286                                  MMC_CAP2_PACKED_WR)
 287 #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14)   /* Don't power up before scan */
 288 #define MMC_CAP2_HS400_1_8V     (1 << 15)       /* Can support HS400 1.8V */
 289 #define MMC_CAP2_HS400_1_2V     (1 << 16)       /* Can support HS400 1.2V */
 290 #define MMC_CAP2_HS400          (MMC_CAP2_HS400_1_8V | \
 291                                  MMC_CAP2_HS400_1_2V)
 292 #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
 293
 294         mmc_pm_flag_t           pm_caps;        /* supported pm features */
 295
 296 #ifdef CONFIG_MMC_CLKGATE
 297         int                     clk_requests;   /* internal reference counter */
 298         unsigned int            clk_delay;      /* number of MCI clk hold cycles */
 299         bool                    clk_gated;      /* clock gated */
 300         struct delayed_work     clk_gate_work; /* delayed clock gate */
 301         unsigned int            clk_old;        /* old clock value cache */
 302         spinlock_t              clk_lock;       /* lock for clk fields */
 303         struct mutex            clk_gate_mutex; /* mutex for clock gating */
 304         struct device_attribute clkgate_delay_attr;
 305         unsigned long           clkgate_delay;
 306 #endif
 307
 308         /* host specific block data */
 309         unsigned int            max_seg_size;   /* see blk_queue_max_segment_size */
 310         unsigned short          max_segs;       /* see blk_queue_max_segments */
 311         unsigned short          unused;
 312         unsigned int            max_req_size;   /* maximum number of bytes in one req */
 313         unsigned int            max_blk_size;   /* maximum size of one mmc block */
 314         unsigned int            max_blk_count;  /* maximum number of blocks in one req */
 315         unsigned int            max_busy_timeout; /* max busy timeout in ms */
 316
 317         /* private data */
 318         spinlock_t              lock;           /* lock for claim and bus ops */
 319
 320         struct mmc_ios          ios;            /* current io bus settings */
 321
 322         /* group bitfields together to minimize padding */
 323         unsigned int            use_spi_crc:1;
 324         unsigned int            claimed:1;      /* host exclusively claimed */
 325         unsigned int            bus_dead:1;     /* bus has been released */
 326 #ifdef CONFIG_MMC_DEBUG
 327         unsigned int            removed:1;      /* host is being removed */
 328 #endif
 329
 330         int                     rescan_disable; /* disable card detection */
 331         int                     rescan_entered; /* used with nonremovable devices */
 332
 333         bool                    trigger_card_event; /* card_event necessary */
 334
 335         struct mmc_card         *card;          /* device attached to this host */
 336
 337         wait_queue_head_t       wq;
 338         struct task_struct      *claimer;       /* task that has host claimed */
 339         int                     claim_cnt;      /* "claim" nesting count */
 340
 341         struct delayed_work     detect;
 342         int                     detect_change;  /* card detect flag */
 343         struct mmc_slot         slot;
 344
 345         const struct mmc_bus_ops *bus_ops;      /* current bus driver */
 346         unsigned int            bus_refs;       /* reference counter */
 347
 348         unsigned int            sdio_irqs;
 349         struct task_struct      *sdio_irq_thread;
 350         bool                    sdio_irq_pending;
 351         atomic_t                sdio_irq_thread_abort;
 352
 353         mmc_pm_flag_t           pm_flags;       /* requested pm features */
 354
 355         struct led_trigger      *led;           /* activity led */
 356
 357 #ifdef CONFIG_REGULATOR
 358         bool                    regulator_enabled; /* regulator state */
 359 #endif
 360         struct mmc_supply       supply;
 361
 362         struct dentry           *debugfs_root;
 363
 364         struct mmc_async_req    *areq;          /* active async req */
 365         struct mmc_context_info context_info;   /* async synchronization info */
 366
 367 #ifdef CONFIG_FAIL_MMC_REQUEST
 368         struct fault_attr       fail_mmc_request;
 369 #endif
 370
 371         unsigned int            actual_clock;   /* Actual HC clock rate */
 372
 373         unsigned int            slotno; /* used for sdio acpi binding */
 374
 375         int                     dsr_req;        /* DSR value is valid */
 376         u32                     dsr;    /* optional driver stage (DSR) value */
 377
 378         unsigned long           private[0] ____cacheline_aligned;
 379 };
 380
 381 struct mmc_host *mmc_alloc_host(int extra, struct device *);
 382 int mmc_add_host(struct mmc_host *);
 383 void mmc_remove_host(struct mmc_host *);
 384 void mmc_free_host(struct mmc_host *);
 385 int mmc_of_parse(struct mmc_host *host);
 386
 387 static inline void *mmc_priv(struct mmc_host *host)
 388 {
 389         return (void *)host->private;
 390 }
 391
 392 #define mmc_host_is_spi(host)   ((host)->caps & MMC_CAP_SPI)
 393
 394 #define mmc_dev(x)      ((x)->parent)
 395 #define mmc_classdev(x) (&(x)->class_dev)
 396 #define mmc_hostname(x) (dev_name(&(x)->class_dev))
 397
 398 int mmc_power_save_host(struct mmc_host *host);
 399 int mmc_power_restore_host(struct mmc_host *host);
 400
 401 void mmc_detect_change(struct mmc_host *, unsigned long delay);
 402 void mmc_request_done(struct mmc_host *, struct mmc_request *);
 403
 404 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 405 {
 406         host->ops->enable_sdio_irq(host, 0);
 407         host->sdio_irq_pending = true;
 408         wake_up_process(host->sdio_irq_thread);
 409 }
 410
 411 void sdio_run_irqs(struct mmc_host *host);
 412
 413 #ifdef CONFIG_REGULATOR
 414 int mmc_regulator_get_ocrmask(struct regulator *supply);
 415 int mmc_regulator_set_ocr(struct mmc_host *mmc,
 416                         struct regulator *supply,
 417                         unsigned short vdd_bit);
 418 #else
 419 static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
 420 {
 421         return 0;
 422 }
 423
 424 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
 425                                  struct regulator *supply,
 426                                  unsigned short vdd_bit)
 427 {
 428         return 0;
 429 }
 430 #endif
 431
 432 int mmc_regulator_get_supply(struct mmc_host *mmc);
 433
 434 int mmc_pm_notify(struct notifier_block *notify_block, unsigned long, void *);
 435
 436 static inline int mmc_card_is_removable(struct mmc_host *host)
 437 {
 438         return !(host->caps & MMC_CAP_NONREMOVABLE);
 439 }
 440
 441 static inline int mmc_card_keep_power(struct mmc_host *host)
 442 {
 443         return host->pm_flags & MMC_PM_KEEP_POWER;
 444 }
 445
 446 static inline int mmc_card_wake_sdio_irq(struct mmc_host *host)
 447 {
 448         return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;
 449 }
 450
 451 static inline int mmc_host_cmd23(struct mmc_host *host)
 452 {
 453         return host->caps & MMC_CAP_CMD23;
 454 }
 455
 456 static inline int mmc_boot_partition_access(struct mmc_host *host)
 457 {
 458         return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
 459 }
 460
 461 static inline int mmc_host_uhs(struct mmc_host *host)
 462 {
 463         return host->caps &
 464                 (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
 465                  MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
 466                  MMC_CAP_UHS_DDR50);
 467 }
 468
 469 static inline int mmc_host_packed_wr(struct mmc_host *host)
 470 {
 471         return host->caps2 & MMC_CAP2_PACKED_WR;
 472 }
 473
 474 #ifdef CONFIG_MMC_CLKGATE
 475 void mmc_host_clk_hold(struct mmc_host *host);
 476 void mmc_host_clk_release(struct mmc_host *host);
 477 unsigned int mmc_host_clk_rate(struct mmc_host *host);
 478
 479 #else
 480 static inline void mmc_host_clk_hold(struct mmc_host *host)
 481 {
 482 }
 483
 484 static inline void mmc_host_clk_release(struct mmc_host *host)
 485 {
 486 }
 487
 488 static inline unsigned int mmc_host_clk_rate(struct mmc_host *host)
 489 {
 490         return host->ios.clock;
 491 }
 492 #endif
 493
 494 static inline int mmc_card_hs(struct mmc_card *card)
 495 {
 496         return card->host->ios.timing == MMC_TIMING_SD_HS ||
 497                 card->host->ios.timing == MMC_TIMING_MMC_HS;
 498 }
 499
 500 static inline int mmc_card_uhs(struct mmc_card *card)
 501 {
 502         return card->host->ios.timing >= MMC_TIMING_UHS_SDR12 &&
 503                 card->host->ios.timing <= MMC_TIMING_UHS_DDR50;
 504 }
 505
 506 static inline bool mmc_card_hs200(struct mmc_card *card)
 507 {
 508         return card->host->ios.timing == MMC_TIMING_MMC_HS200;
 509 }
 510
 511 static inline bool mmc_card_ddr52(struct mmc_card *card)
 512 {
 513         return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
 514 }
 515
 516 static inline bool mmc_card_hs400(struct mmc_card *card)
 517 {
 518         return card->host->ios.timing == MMC_TIMING_MMC_HS400;
 519 }
 520
 521 #endif /* LINUX_MMC_HOST_H */