LXR linux/include/linux/mmc/host.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *  linux/include/linux/mmc/host.h
   4 *
   5 *  Host driver specific definitions.
   6 */
   7#ifndef LINUX_MMC_HOST_H
   8#define LINUX_MMC_HOST_H
   9
  10#include <linux/sched.h>
  11#include <linux/device.h>
  12#include <linux/fault-inject.h>
  13
  14#include <linux/mmc/core.h>
  15#include <linux/mmc/card.h>
  16#include <linux/mmc/pm.h>
  17#include <linux/dma-direction.h>
  18
  19struct mmc_ios {
  20        unsigned int    clock;                  /* clock rate */
  21        unsigned short  vdd;
  22        unsigned int    power_delay_ms;         /* waiting for stable power */
  23
  24/* vdd stores the bit number of the selected voltage range from below. */
  25
  26        unsigned char   bus_mode;               /* command output mode */
  27
  28#define MMC_BUSMODE_OPENDRAIN   1
  29#define MMC_BUSMODE_PUSHPULL    2
  30
  31        unsigned char   chip_select;            /* SPI chip select */
  32
  33#define MMC_CS_DONTCARE         0
  34#define MMC_CS_HIGH             1
  35#define MMC_CS_LOW              2
  36
  37        unsigned char   power_mode;             /* power supply mode */
  38
  39#define MMC_POWER_OFF           0
  40#define MMC_POWER_UP            1
  41#define MMC_POWER_ON            2
  42#define MMC_POWER_UNDEFINED     3
  43
  44        unsigned char   bus_width;              /* data bus width */
  45
  46#define MMC_BUS_WIDTH_1         0
  47#define MMC_BUS_WIDTH_4         2
  48#define MMC_BUS_WIDTH_8         3
  49
  50        unsigned char   timing;                 /* timing specification used */
  51
  52#define MMC_TIMING_LEGACY       0
  53#define MMC_TIMING_MMC_HS       1
  54#define MMC_TIMING_SD_HS        2
  55#define MMC_TIMING_UHS_SDR12    3
  56#define MMC_TIMING_UHS_SDR25    4
  57#define MMC_TIMING_UHS_SDR50    5
  58#define MMC_TIMING_UHS_SDR104   6
  59#define MMC_TIMING_UHS_DDR50    7
  60#define MMC_TIMING_MMC_DDR52    8
  61#define MMC_TIMING_MMC_HS200    9
  62#define MMC_TIMING_MMC_HS400    10
  63
  64        unsigned char   signal_voltage;         /* signalling voltage (1.8V or 3.3V) */
  65
  66#define MMC_SIGNAL_VOLTAGE_330  0
  67#define MMC_SIGNAL_VOLTAGE_180  1
  68#define MMC_SIGNAL_VOLTAGE_120  2
  69
  70        unsigned char   drv_type;               /* driver type (A, B, C, D) */
  71
  72#define MMC_SET_DRIVER_TYPE_B   0
  73#define MMC_SET_DRIVER_TYPE_A   1
  74#define MMC_SET_DRIVER_TYPE_C   2
  75#define MMC_SET_DRIVER_TYPE_D   3
  76
  77        bool enhanced_strobe;                   /* hs400es selection */
  78};
  79
  80struct mmc_host;
  81
  82struct mmc_host_ops {
  83        /*
  84         * It is optional for the host to implement pre_req and post_req in
  85         * order to support double buffering of requests (prepare one
  86         * request while another request is active).
  87         * pre_req() must always be followed by a post_req().
  88         * To undo a call made to pre_req(), call post_req() with
  89         * a nonzero err condition.
  90         */
  91        void    (*post_req)(struct mmc_host *host, struct mmc_request *req,
  92                            int err);
  93        void    (*pre_req)(struct mmc_host *host, struct mmc_request *req);
  94        void    (*request)(struct mmc_host *host, struct mmc_request *req);
  95        /* Submit one request to host in atomic context. */
  96        int     (*request_atomic)(struct mmc_host *host,
  97                                  struct mmc_request *req);
  98
  99        /*
 100         * Avoid calling the next three functions too often or in a "fast
 101         * path", since underlaying controller might implement them in an
 102         * expensive and/or slow way. Also note that these functions might
 103         * sleep, so don't call them in the atomic contexts!
 104         */
 105
 106        /*
 107         * Notes to the set_ios callback:
 108         * ios->clock might be 0. For some controllers, setting 0Hz
 109         * as any other frequency works. However, some controllers
 110         * explicitly need to disable the clock. Otherwise e.g. voltage
 111         * switching might fail because the SDCLK is not really quiet.
 112         */
 113        void    (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
 114
 115        /*
 116         * Return values for the get_ro callback should be:
 117         *   0 for a read/write card
 118         *   1 for a read-only card
 119         *   -ENOSYS when not supported (equal to NULL callback)
 120         *   or a negative errno value when something bad happened
 121         */
 122        int     (*get_ro)(struct mmc_host *host);
 123
 124        /*
 125         * Return values for the get_cd callback should be:
 126         *   0 for a absent card
 127         *   1 for a present card
 128         *   -ENOSYS when not supported (equal to NULL callback)
 129         *   or a negative errno value when something bad happened
 130         */
 131        int     (*get_cd)(struct mmc_host *host);
 132
 133        void    (*enable_sdio_irq)(struct mmc_host *host, int enable);
 134        /* Mandatory callback when using MMC_CAP2_SDIO_IRQ_NOTHREAD. */
 135        void    (*ack_sdio_irq)(struct mmc_host *host);
 136
 137        /* optional callback for HC quirks */
 138        void    (*init_card)(struct mmc_host *host, struct mmc_card *card);
 139
 140        int     (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
 141
 142        /* Check if the card is pulling dat[0:3] low */
 143        int     (*card_busy)(struct mmc_host *host);
 144
 145        /* The tuning command opcode value is different for SD and eMMC cards */
 146        int     (*execute_tuning)(struct mmc_host *host, u32 opcode);
 147
 148        /* Prepare HS400 target operating frequency depending host driver */
 149        int     (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
 150
 151        /* Prepare switch to DDR during the HS400 init sequence */
 152        int     (*hs400_prepare_ddr)(struct mmc_host *host);
 153
 154        /* Prepare for switching from HS400 to HS200 */
 155        void    (*hs400_downgrade)(struct mmc_host *host);
 156
 157        /* Complete selection of HS400 */
 158        void    (*hs400_complete)(struct mmc_host *host);
 159
 160        /* Prepare enhanced strobe depending host driver */
 161        void    (*hs400_enhanced_strobe)(struct mmc_host *host,
 162                                         struct mmc_ios *ios);
 163        int     (*select_drive_strength)(struct mmc_card *card,
 164                                         unsigned int max_dtr, int host_drv,
 165                                         int card_drv, int *drv_type);
 166        void    (*hw_reset)(struct mmc_host *host);
 167        void    (*card_event)(struct mmc_host *host);
 168
 169        /*
 170         * Optional callback to support controllers with HW issues for multiple
 171         * I/O. Returns the number of supported blocks for the request.
 172         */
 173        int     (*multi_io_quirk)(struct mmc_card *card,
 174                                  unsigned int direction, int blk_size);
 175};
 176
 177struct mmc_cqe_ops {
 178        /* Allocate resources, and make the CQE operational */
 179        int     (*cqe_enable)(struct mmc_host *host, struct mmc_card *card);
 180        /* Free resources, and make the CQE non-operational */
 181        void    (*cqe_disable)(struct mmc_host *host);
 182        /*
 183         * Issue a read, write or DCMD request to the CQE. Also deal with the
 184         * effect of ->cqe_off().
 185         */
 186        int     (*cqe_request)(struct mmc_host *host, struct mmc_request *mrq);
 187        /* Free resources (e.g. DMA mapping) associated with the request */
 188        void    (*cqe_post_req)(struct mmc_host *host, struct mmc_request *mrq);
 189        /*
 190         * Prepare the CQE and host controller to accept non-CQ commands. There
 191         * is no corresponding ->cqe_on(), instead ->cqe_request() is required
 192         * to deal with that.
 193         */
 194        void    (*cqe_off)(struct mmc_host *host);
 195        /*
 196         * Wait for all CQE tasks to complete. Return an error if recovery
 197         * becomes necessary.
 198         */
 199        int     (*cqe_wait_for_idle)(struct mmc_host *host);
 200        /*
 201         * Notify CQE that a request has timed out. Return false if the request
 202         * completed or true if a timeout happened in which case indicate if
 203         * recovery is needed.
 204         */
 205        bool    (*cqe_timeout)(struct mmc_host *host, struct mmc_request *mrq,
 206                               bool *recovery_needed);
 207        /*
 208         * Stop all CQE activity and prepare the CQE and host controller to
 209         * accept recovery commands.
 210         */
 211        void    (*cqe_recovery_start)(struct mmc_host *host);
 212        /*
 213         * Clear the queue and call mmc_cqe_request_done() on all requests.
 214         * Requests that errored will have the error set on the mmc_request
 215         * (data->error or cmd->error for DCMD).  Requests that did not error
 216         * will have zero data bytes transferred.
 217         */
 218        void    (*cqe_recovery_finish)(struct mmc_host *host);
 219};
 220
 221struct mmc_async_req {
 222        /* active mmc request */
 223        struct mmc_request      *mrq;
 224        /*
 225         * Check error status of completed mmc request.
 226         * Returns 0 if success otherwise non zero.
 227         */
 228        enum mmc_blk_status (*err_check)(struct mmc_card *, struct mmc_async_req *);
 229};
 230
 231/**
 232 * struct mmc_slot - MMC slot functions
 233 *
 234 * @cd_irq:             MMC/SD-card slot hotplug detection IRQ or -EINVAL
 235 * @handler_priv:       MMC/SD-card slot context
 236 *
 237 * Some MMC/SD host controllers implement slot-functions like card and
 238 * write-protect detection natively. However, a large number of controllers
 239 * leave these functions to the CPU. This struct provides a hook to attach
 240 * such slot-function drivers.
 241 */
 242struct mmc_slot {
 243        int cd_irq;
 244        bool cd_wake_enabled;
 245        void *handler_priv;
 246};
 247
 248/**
 249 * mmc_context_info - synchronization details for mmc context
 250 * @is_done_rcv         wake up reason was done request
 251 * @is_new_req          wake up reason was new request
 252 * @is_waiting_last_req mmc context waiting for single running request
 253 * @wait                wait queue
 254 */
 255struct mmc_context_info {
 256        bool                    is_done_rcv;
 257        bool                    is_new_req;
 258        bool                    is_waiting_last_req;
 259        wait_queue_head_t       wait;
 260};
 261
 262struct regulator;
 263struct mmc_pwrseq;
 264
 265struct mmc_supply {
 266        struct regulator *vmmc;         /* Card power supply */
 267        struct regulator *vqmmc;        /* Optional Vccq supply */
 268};
 269
 270struct mmc_ctx {
 271        struct task_struct *task;
 272};
 273
 274struct mmc_host {
 275        struct device           *parent;
 276        struct device           class_dev;
 277        int                     index;
 278        const struct mmc_host_ops *ops;
 279        struct mmc_pwrseq       *pwrseq;
 280        unsigned int            f_min;
 281        unsigned int            f_max;
 282        unsigned int            f_init;
 283        u32                     ocr_avail;
 284        u32                     ocr_avail_sdio; /* SDIO-specific OCR */
 285        u32                     ocr_avail_sd;   /* SD-specific OCR */
 286        u32                     ocr_avail_mmc;  /* MMC-specific OCR */
 287#ifdef CONFIG_PM_SLEEP
 288        struct notifier_block   pm_notify;
 289#endif
 290        struct wakeup_source    *ws;            /* Enable consume of uevents */
 291        u32                     max_current_330;
 292        u32                     max_current_300;
 293        u32                     max_current_180;
 294
 295#define MMC_VDD_165_195         0x00000080      /* VDD voltage 1.65 - 1.95 */
 296#define MMC_VDD_20_21           0x00000100      /* VDD voltage 2.0 ~ 2.1 */
 297#define MMC_VDD_21_22           0x00000200      /* VDD voltage 2.1 ~ 2.2 */
 298#define MMC_VDD_22_23           0x00000400      /* VDD voltage 2.2 ~ 2.3 */
 299#define MMC_VDD_23_24           0x00000800      /* VDD voltage 2.3 ~ 2.4 */
 300#define MMC_VDD_24_25           0x00001000      /* VDD voltage 2.4 ~ 2.5 */
 301#define MMC_VDD_25_26           0x00002000      /* VDD voltage 2.5 ~ 2.6 */
 302#define MMC_VDD_26_27           0x00004000      /* VDD voltage 2.6 ~ 2.7 */
 303#define MMC_VDD_27_28           0x00008000      /* VDD voltage 2.7 ~ 2.8 */
 304#define MMC_VDD_28_29           0x00010000      /* VDD voltage 2.8 ~ 2.9 */
 305#define MMC_VDD_29_30           0x00020000      /* VDD voltage 2.9 ~ 3.0 */
 306#define MMC_VDD_30_31           0x00040000      /* VDD voltage 3.0 ~ 3.1 */
 307#define MMC_VDD_31_32           0x00080000      /* VDD voltage 3.1 ~ 3.2 */
 308#define MMC_VDD_32_33           0x00100000      /* VDD voltage 3.2 ~ 3.3 */
 309#define MMC_VDD_33_34           0x00200000      /* VDD voltage 3.3 ~ 3.4 */
 310#define MMC_VDD_34_35           0x00400000      /* VDD voltage 3.4 ~ 3.5 */
 311#define MMC_VDD_35_36           0x00800000      /* VDD voltage 3.5 ~ 3.6 */
 312
 313        u32                     caps;           /* Host capabilities */
 314
 315#define MMC_CAP_4_BIT_DATA      (1 << 0)        /* Can the host do 4 bit transfers */
 316#define MMC_CAP_MMC_HIGHSPEED   (1 << 1)        /* Can do MMC high-speed timing */
 317#define MMC_CAP_SD_HIGHSPEED    (1 << 2)        /* Can do SD high-speed timing */
 318#define MMC_CAP_SDIO_IRQ        (1 << 3)        /* Can signal pending SDIO IRQs */
 319#define MMC_CAP_SPI             (1 << 4)        /* Talks only SPI protocols */
 320#define MMC_CAP_NEEDS_POLL      (1 << 5)        /* Needs polling for card-detection */
 321#define MMC_CAP_8_BIT_DATA      (1 << 6)        /* Can the host do 8 bit transfers */
 322#define MMC_CAP_AGGRESSIVE_PM   (1 << 7)        /* Suspend (e)MMC/SD at idle  */
 323#define MMC_CAP_NONREMOVABLE    (1 << 8)        /* Nonremovable e.g. eMMC */
 324#define MMC_CAP_WAIT_WHILE_BUSY (1 << 9)        /* Waits while card is busy */
 325#define MMC_CAP_3_3V_DDR        (1 << 11)       /* Host supports eMMC DDR 3.3V */
 326#define MMC_CAP_1_8V_DDR        (1 << 12)       /* Host supports eMMC DDR 1.8V */
 327#define MMC_CAP_1_2V_DDR        (1 << 13)       /* Host supports eMMC DDR 1.2V */
 328#define MMC_CAP_DDR             (MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR | \
 329                                 MMC_CAP_1_2V_DDR)
 330#define MMC_CAP_POWER_OFF_CARD  (1 << 14)       /* Can power off after boot */
 331#define MMC_CAP_BUS_WIDTH_TEST  (1 << 15)       /* CMD14/CMD19 bus width ok */
 332#define MMC_CAP_UHS_SDR12       (1 << 16)       /* Host supports UHS SDR12 mode */
 333#define MMC_CAP_UHS_SDR25       (1 << 17)       /* Host supports UHS SDR25 mode */
 334#define MMC_CAP_UHS_SDR50       (1 << 18)       /* Host supports UHS SDR50 mode */
 335#define MMC_CAP_UHS_SDR104      (1 << 19)       /* Host supports UHS SDR104 mode */
 336#define MMC_CAP_UHS_DDR50       (1 << 20)       /* Host supports UHS DDR50 mode */
 337#define MMC_CAP_UHS             (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | \
 338                                 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | \
 339                                 MMC_CAP_UHS_DDR50)
 340#define MMC_CAP_SYNC_RUNTIME_PM (1 << 21)       /* Synced runtime PM suspends. */
 341#define MMC_CAP_NEED_RSP_BUSY   (1 << 22)       /* Commands with R1B can't use R1. */
 342#define MMC_CAP_DRIVER_TYPE_A   (1 << 23)       /* Host supports Driver Type A */
 343#define MMC_CAP_DRIVER_TYPE_C   (1 << 24)       /* Host supports Driver Type C */
 344#define MMC_CAP_DRIVER_TYPE_D   (1 << 25)       /* Host supports Driver Type D */
 345#define MMC_CAP_DONE_COMPLETE   (1 << 27)       /* RW reqs can be completed within mmc_request_done() */
 346#define MMC_CAP_CD_WAKE         (1 << 28)       /* Enable card detect wake */
 347#define MMC_CAP_CMD_DURING_TFR  (1 << 29)       /* Commands during data transfer */
 348#define MMC_CAP_CMD23           (1 << 30)       /* CMD23 supported. */
 349#define MMC_CAP_HW_RESET        (1 << 31)       /* Hardware reset */
 350
 351        u32                     caps2;          /* More host capabilities */
 352
 353#define MMC_CAP2_BOOTPART_NOACC (1 << 0)        /* Boot partition no access */
 354#define MMC_CAP2_FULL_PWR_CYCLE (1 << 2)        /* Can do full power cycle */
 355#define MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND (1 << 3) /* Can do full power cycle in suspend */
 356#define MMC_CAP2_HS200_1_8V_SDR (1 << 5)        /* can support */
 357#define MMC_CAP2_HS200_1_2V_SDR (1 << 6)        /* can support */
 358#define MMC_CAP2_HS200          (MMC_CAP2_HS200_1_8V_SDR | \
 359                                 MMC_CAP2_HS200_1_2V_SDR)
 360#define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10)       /* Card-detect signal active high */
 361#define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11)       /* Write-protect signal active high */
 362#define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14)   /* Don't power up before scan */
 363#define MMC_CAP2_HS400_1_8V     (1 << 15)       /* Can support HS400 1.8V */
 364#define MMC_CAP2_HS400_1_2V     (1 << 16)       /* Can support HS400 1.2V */
 365#define MMC_CAP2_HS400          (MMC_CAP2_HS400_1_8V | \
 366                                 MMC_CAP2_HS400_1_2V)
 367#define MMC_CAP2_HSX00_1_8V     (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V)
 368#define MMC_CAP2_HSX00_1_2V     (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V)
 369#define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
 370#define MMC_CAP2_NO_WRITE_PROTECT (1 << 18)     /* No physical write protect pin, assume that card is always read-write */
 371#define MMC_CAP2_NO_SDIO        (1 << 19)       /* Do not send SDIO commands during initialization */
 372#define MMC_CAP2_HS400_ES       (1 << 20)       /* Host supports enhanced strobe */
 373#define MMC_CAP2_NO_SD          (1 << 21)       /* Do not send SD commands during initialization */
 374#define MMC_CAP2_NO_MMC         (1 << 22)       /* Do not send (e)MMC commands during initialization */
 375#define MMC_CAP2_CQE            (1 << 23)       /* Has eMMC command queue engine */
 376#define MMC_CAP2_CQE_DCMD       (1 << 24)       /* CQE can issue a direct command */
 377#define MMC_CAP2_AVOID_3_3V     (1 << 25)       /* Host must negotiate down from 3.3V */
 378#define MMC_CAP2_MERGE_CAPABLE  (1 << 26)       /* Host can merge a segment over the segment size */
 379
 380        int                     fixed_drv_type; /* fixed driver type for non-removable media */
 381
 382        mmc_pm_flag_t           pm_caps;        /* supported pm features */
 383
 384        /* host specific block data */
 385        unsigned int            max_seg_size;   /* see blk_queue_max_segment_size */
 386        unsigned short          max_segs;       /* see blk_queue_max_segments */
 387        unsigned short          unused;
 388        unsigned int            max_req_size;   /* maximum number of bytes in one req */
 389        unsigned int            max_blk_size;   /* maximum size of one mmc block */
 390        unsigned int            max_blk_count;  /* maximum number of blocks in one req */
 391        unsigned int            max_busy_timeout; /* max busy timeout in ms */
 392
 393        /* private data */
 394        spinlock_t              lock;           /* lock for claim and bus ops */
 395
 396        struct mmc_ios          ios;            /* current io bus settings */
 397
 398        /* group bitfields together to minimize padding */
 399        unsigned int            use_spi_crc:1;
 400        unsigned int            claimed:1;      /* host exclusively claimed */
 401        unsigned int            bus_dead:1;     /* bus has been released */
 402        unsigned int            can_retune:1;   /* re-tuning can be used */
 403        unsigned int            doing_retune:1; /* re-tuning in progress */
 404        unsigned int            retune_now:1;   /* do re-tuning at next req */
 405        unsigned int            retune_paused:1; /* re-tuning is temporarily disabled */
 406        unsigned int            use_blk_mq:1;   /* use blk-mq */
 407        unsigned int            retune_crc_disable:1; /* don't trigger retune upon crc */
 408        unsigned int            can_dma_map_merge:1; /* merging can be used */
 409
 410        int                     rescan_disable; /* disable card detection */
 411        int                     rescan_entered; /* used with nonremovable devices */
 412
 413        int                     need_retune;    /* re-tuning is needed */
 414        int                     hold_retune;    /* hold off re-tuning */
 415        unsigned int            retune_period;  /* re-tuning period in secs */
 416        struct timer_list       retune_timer;   /* for periodic re-tuning */
 417
 418        bool                    trigger_card_event; /* card_event necessary */
 419
 420        struct mmc_card         *card;          /* device attached to this host */
 421
 422        wait_queue_head_t       wq;
 423        struct mmc_ctx          *claimer;       /* context that has host claimed */
 424        int                     claim_cnt;      /* "claim" nesting count */
 425        struct mmc_ctx          default_ctx;    /* default context */
 426
 427        struct delayed_work     detect;
 428        int                     detect_change;  /* card detect flag */
 429        struct mmc_slot         slot;
 430
 431        const struct mmc_bus_ops *bus_ops;      /* current bus driver */
 432        unsigned int            bus_refs;       /* reference counter */
 433
 434        unsigned int            sdio_irqs;
 435        struct task_struct      *sdio_irq_thread;
 436        struct delayed_work     sdio_irq_work;
 437        bool                    sdio_irq_pending;
 438        atomic_t                sdio_irq_thread_abort;
 439
 440        mmc_pm_flag_t           pm_flags;       /* requested pm features */
 441
 442        struct led_trigger      *led;           /* activity led */
 443
 444#ifdef CONFIG_REGULATOR
 445        bool                    regulator_enabled; /* regulator state */
 446#endif
 447        struct mmc_supply       supply;
 448
 449        struct dentry           *debugfs_root;
 450
 451        /* Ongoing data transfer that allows commands during transfer */
 452        struct mmc_request      *ongoing_mrq;
 453
 454#ifdef CONFIG_FAIL_MMC_REQUEST
 455        struct fault_attr       fail_mmc_request;
 456#endif
 457
 458        unsigned int            actual_clock;   /* Actual HC clock rate */
 459
 460        unsigned int            slotno; /* used for sdio acpi binding */
 461
 462        int                     dsr_req;        /* DSR value is valid */
 463        u32                     dsr;    /* optional driver stage (DSR) value */
 464
 465        /* Command Queue Engine (CQE) support */
 466        const struct mmc_cqe_ops *cqe_ops;
 467        void                    *cqe_private;
 468        int                     cqe_qdepth;
 469        bool                    cqe_enabled;
 470        bool                    cqe_on;
 471
 472        /* Host Software Queue support */
 473        bool                    hsq_enabled;
 474
 475        unsigned long           private[] ____cacheline_aligned;
 476};
 477
 478struct device_node;
 479
 480struct mmc_host *mmc_alloc_host(int extra, struct device *);
 481int mmc_add_host(struct mmc_host *);
 482void mmc_remove_host(struct mmc_host *);
 483void mmc_free_host(struct mmc_host *);
 484int mmc_of_parse(struct mmc_host *host);
 485int mmc_of_parse_voltage(struct device_node *np, u32 *mask);
 486
 487static inline void *mmc_priv(struct mmc_host *host)
 488{
 489        return (void *)host->private;
 490}
 491
 492static inline struct mmc_host *mmc_from_priv(void *priv)
 493{
 494        return container_of(priv, struct mmc_host, private);
 495}
 496
 497#define mmc_host_is_spi(host)   ((host)->caps & MMC_CAP_SPI)
 498
 499#define mmc_dev(x)      ((x)->parent)
 500#define mmc_classdev(x) (&(x)->class_dev)
 501#define mmc_hostname(x) (dev_name(&(x)->class_dev))
 502
 503void mmc_detect_change(struct mmc_host *, unsigned long delay);
 504void mmc_request_done(struct mmc_host *, struct mmc_request *);
 505void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq);
 506
 507void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq);
 508
 509/*
 510 * May be called from host driver's system/runtime suspend/resume callbacks,
 511 * to know if SDIO IRQs has been claimed.
 512 */
 513static inline bool sdio_irq_claimed(struct mmc_host *host)
 514{
 515        return host->sdio_irqs > 0;
 516}
 517
 518static inline void mmc_signal_sdio_irq(struct mmc_host *host)
 519{
 520        host->ops->enable_sdio_irq(host, 0);
 521        host->sdio_irq_pending = true;
 522        if (host->sdio_irq_thread)
 523                wake_up_process(host->sdio_irq_thread);
 524}
 525
 526void sdio_signal_irq(struct mmc_host *host);
 527
 528#ifdef CONFIG_REGULATOR
 529int mmc_regulator_set_ocr(struct mmc_host *mmc,
 530                        struct regulator *supply,
 531                        unsigned short vdd_bit);
 532int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios);
 533#else
 534static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
 535                                 struct regulator *supply,
 536                                 unsigned short vdd_bit)
 537{
 538        return 0;
 539}
 540
 541static inline int mmc_regulator_set_vqmmc(struct mmc_host *mmc,
 542                                          struct mmc_ios *ios)
 543{
 544        return -EINVAL;
 545}
 546#endif
 547
 548int mmc_regulator_get_supply(struct mmc_host *mmc);
 549
 550static inline int mmc_card_is_removable(struct mmc_host *host)
 551{
 552        return !(host->caps & MMC_CAP_NONREMOVABLE);
 553}
 554
 555static inline int mmc_card_keep_power(struct mmc_host *host)
 556{
 557        return host->pm_flags & MMC_PM_KEEP_POWER;
 558}
 559
 560static inline int mmc_card_wake_sdio_irq(struct mmc_host *host)
 561{
 562        return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;
 563}
 564
 565/* TODO: Move to private header */
 566static inline int mmc_card_hs(struct mmc_card *card)
 567{
 568        return card->host->ios.timing == MMC_TIMING_SD_HS ||
 569                card->host->ios.timing == MMC_TIMING_MMC_HS;
 570}
 571
 572/* TODO: Move to private header */
 573static inline int mmc_card_uhs(struct mmc_card *card)
 574{
 575        return card->host->ios.timing >= MMC_TIMING_UHS_SDR12 &&
 576                card->host->ios.timing <= MMC_TIMING_UHS_DDR50;
 577}
 578
 579void mmc_retune_timer_stop(struct mmc_host *host);
 580
 581static inline void mmc_retune_needed(struct mmc_host *host)
 582{
 583        if (host->can_retune)
 584                host->need_retune = 1;
 585}
 586
 587static inline bool mmc_can_retune(struct mmc_host *host)
 588{
 589        return host->can_retune == 1;
 590}
 591
 592static inline bool mmc_doing_retune(struct mmc_host *host)
 593{
 594        return host->doing_retune == 1;
 595}
 596
 597static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
 598{
 599        return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 600}
 601
 602int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
 603int mmc_abort_tuning(struct mmc_host *host, u32 opcode);
 604
 605#endif /* LINUX_MMC_HOST_H */
 606