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 #include <linux/keyslot-manager.h> 19 20 struct mmc_ios { 21 unsigned int clock; /* clock rate */ 22 unsigned short vdd; 23 unsigned int power_delay_ms; /* waiting for stable power */ 24 25 /* vdd stores the bit number of the selected voltage range from below. */ 26 27 unsigned char bus_mode; /* command output mode */ 28 29 #define MMC_BUSMODE_OPENDRAIN 1 30 #define MMC_BUSMODE_PUSHPULL 2 31 32 unsigned char chip_select; /* SPI chip select */ 33 34 #define MMC_CS_DONTCARE 0 35 #define MMC_CS_HIGH 1 36 #define MMC_CS_LOW 2 37 38 unsigned char power_mode; /* power supply mode */ 39 40 #define MMC_POWER_OFF 0 41 #define MMC_POWER_UP 1 42 #define MMC_POWER_ON 2 43 #define MMC_POWER_UNDEFINED 3 44 45 unsigned char bus_width; /* data bus width */ 46 47 #define MMC_BUS_WIDTH_1 0 48 #define MMC_BUS_WIDTH_4 2 49 #define MMC_BUS_WIDTH_8 3 50 51 unsigned char timing; /* timing specification used */ 52 53 #define MMC_TIMING_LEGACY 0 54 #define MMC_TIMING_MMC_HS 1 55 #define MMC_TIMING_SD_HS 2 56 #define MMC_TIMING_UHS_SDR12 3 57 #define MMC_TIMING_UHS_SDR25 4 58 #define MMC_TIMING_UHS_SDR50 5 59 #define MMC_TIMING_UHS_SDR104 6 60 #define MMC_TIMING_UHS_DDR50 7 61 #define MMC_TIMING_MMC_DDR52 8 62 #define MMC_TIMING_MMC_HS200 9 63 #define MMC_TIMING_MMC_HS400 10 64 #define MMC_TIMING_SD_EXP 11 65 #define MMC_TIMING_SD_EXP_1_2V 12 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 bool enhanced_strobe; /* hs400es selection */ 81 }; 82 83 struct mmc_clk_phase { 84 bool valid; 85 u16 in_deg; 86 u16 out_deg; 87 }; 88 89 #define MMC_NUM_CLK_PHASES (MMC_TIMING_MMC_HS400 + 1) 90 struct mmc_clk_phase_map { 91 struct mmc_clk_phase phase[MMC_NUM_CLK_PHASES]; 92 }; 93 94 struct mmc_host; 95 96 struct mmc_host_ops { 97 /* 98 * It is optional for the host to implement pre_req and post_req in 99 * order to support double buffering of requests (prepare one 100 * request while another request is active). 101 * pre_req() must always be followed by a post_req(). 102 * To undo a call made to pre_req(), call post_req() with 103 * a nonzero err condition. 104 */ 105 void (*post_req)(struct mmc_host *host, struct mmc_request *req, 106 int err); 107 void (*pre_req)(struct mmc_host *host, struct mmc_request *req); 108 void (*request)(struct mmc_host *host, struct mmc_request *req); 109 /* Submit one request to host in atomic context. */ 110 int (*request_atomic)(struct mmc_host *host, 111 struct mmc_request *req); 112 113 /* 114 * Avoid calling the next three functions too often or in a "fast 115 * path", since underlaying controller might implement them in an 116 * expensive and/or slow way. Also note that these functions might 117 * sleep, so don't call them in the atomic contexts! 118 */ 119 120 /* 121 * Notes to the set_ios callback: 122 * ios->clock might be 0. For some controllers, setting 0Hz 123 * as any other frequency works. However, some controllers 124 * explicitly need to disable the clock. Otherwise e.g. voltage 125 * switching might fail because the SDCLK is not really quiet. 126 */ 127 void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios); 128 129 /* 130 * Return values for the get_ro callback should be: 131 * 0 for a read/write card 132 * 1 for a read-only card 133 * -ENOSYS when not supported (equal to NULL callback) 134 * or a negative errno value when something bad happened 135 */ 136 int (*get_ro)(struct mmc_host *host); 137 138 /* 139 * Return values for the get_cd callback should be: 140 * 0 for a absent card 141 * 1 for a present card 142 * -ENOSYS when not supported (equal to NULL callback) 143 * or a negative errno value when something bad happened 144 */ 145 int (*get_cd)(struct mmc_host *host); 146 147 void (*enable_sdio_irq)(struct mmc_host *host, int enable); 148 /* Mandatory callback when using MMC_CAP2_SDIO_IRQ_NOTHREAD. */ 149 void (*ack_sdio_irq)(struct mmc_host *host); 150 151 /* optional callback for HC quirks */ 152 void (*init_card)(struct mmc_host *host, struct mmc_card *card); 153 154 int (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios); 155 156 /* Check if the card is pulling dat[0:3] low */ 157 int (*card_busy)(struct mmc_host *host); 158 159 /* The tuning command opcode value is different for SD and eMMC cards */ 160 int (*execute_tuning)(struct mmc_host *host, u32 opcode); 161 162 /* Prepare HS400 target operating frequency depending host driver */ 163 int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios); 164 165 /* Prepare switch to DDR during the HS400 init sequence */ 166 int (*hs400_prepare_ddr)(struct mmc_host *host); 167 168 /* Prepare for switching from HS400 to HS200 */ 169 void (*hs400_downgrade)(struct mmc_host *host); 170 171 /* Complete selection of HS400 */ 172 void (*hs400_complete)(struct mmc_host *host); 173 174 /* Prepare enhanced strobe depending host driver */ 175 void (*hs400_enhanced_strobe)(struct mmc_host *host, 176 struct mmc_ios *ios); 177 int (*select_drive_strength)(struct mmc_card *card, 178 unsigned int max_dtr, int host_drv, 179 int card_drv, int *drv_type); 180 /* Reset the eMMC card via RST_n */ 181 void (*hw_reset)(struct mmc_host *host); 182 void (*card_event)(struct mmc_host *host); 183 184 /* 185 * Optional callback to support controllers with HW issues for multiple 186 * I/O. Returns the number of supported blocks for the request. 187 */ 188 int (*multi_io_quirk)(struct mmc_card *card, 189 unsigned int direction, int blk_size); 190 191 /* Initialize an SD express card, mandatory for MMC_CAP2_SD_EXP. */ 192 int (*init_sd_express)(struct mmc_host *host, struct mmc_ios *ios); 193 }; 194 195 struct mmc_cqe_ops { 196 /* Allocate resources, and make the CQE operational */ 197 int (*cqe_enable)(struct mmc_host *host, struct mmc_card *card); 198 /* Free resources, and make the CQE non-operational */ 199 void (*cqe_disable)(struct mmc_host *host); 200 /* 201 * Issue a read, write or DCMD request to the CQE. Also deal with the 202 * effect of ->cqe_off(). 203 */ 204 int (*cqe_request)(struct mmc_host *host, struct mmc_request *mrq); 205 /* Free resources (e.g. DMA mapping) associated with the request */ 206 void (*cqe_post_req)(struct mmc_host *host, struct mmc_request *mrq); 207 /* 208 * Prepare the CQE and host controller to accept non-CQ commands. There 209 * is no corresponding ->cqe_on(), instead ->cqe_request() is required 210 * to deal with that. 211 */ 212 void (*cqe_off)(struct mmc_host *host); 213 /* 214 * Wait for all CQE tasks to complete. Return an error if recovery 215 * becomes necessary. 216 */ 217 int (*cqe_wait_for_idle)(struct mmc_host *host); 218 /* 219 * Notify CQE that a request has timed out. Return false if the request 220 * completed or true if a timeout happened in which case indicate if 221 * recovery is needed. 222 */ 223 bool (*cqe_timeout)(struct mmc_host *host, struct mmc_request *mrq, 224 bool *recovery_needed); 225 /* 226 * Stop all CQE activity and prepare the CQE and host controller to 227 * accept recovery commands. 228 */ 229 void (*cqe_recovery_start)(struct mmc_host *host); 230 /* 231 * Clear the queue and call mmc_cqe_request_done() on all requests. 232 * Requests that errored will have the error set on the mmc_request 233 * (data->error or cmd->error for DCMD). Requests that did not error 234 * will have zero data bytes transferred. 235 */ 236 void (*cqe_recovery_finish)(struct mmc_host *host); 237 }; 238 239 struct mmc_async_req { 240 /* active mmc request */ 241 struct mmc_request *mrq; 242 /* 243 * Check error status of completed mmc request. 244 * Returns 0 if success otherwise non zero. 245 */ 246 enum mmc_blk_status (*err_check)(struct mmc_card *, struct mmc_async_req *); 247 }; 248 249 /** 250 * struct mmc_slot - MMC slot functions 251 * 252 * @cd_irq: MMC/SD-card slot hotplug detection IRQ or -EINVAL 253 * @handler_priv: MMC/SD-card slot context 254 * 255 * Some MMC/SD host controllers implement slot-functions like card and 256 * write-protect detection natively. However, a large number of controllers 257 * leave these functions to the CPU. This struct provides a hook to attach 258 * such slot-function drivers. 259 */ 260 struct mmc_slot { 261 int cd_irq; 262 bool cd_wake_enabled; 263 void *handler_priv; 264 }; 265 266 /** 267 * mmc_context_info - synchronization details for mmc context 268 * @is_done_rcv wake up reason was done request 269 * @is_new_req wake up reason was new request 270 * @is_waiting_last_req mmc context waiting for single running request 271 * @wait wait queue 272 */ 273 struct mmc_context_info { 274 bool is_done_rcv; 275 bool is_new_req; 276 bool is_waiting_last_req; 277 wait_queue_head_t wait; 278 }; 279 280 struct regulator; 281 struct mmc_pwrseq; 282 283 struct mmc_supply { 284 struct regulator *vmmc; /* Card power supply */ 285 struct regulator *vqmmc; /* Optional Vccq supply */ 286 }; 287 288 struct mmc_ctx { 289 struct task_struct *task; 290 }; 291 292 struct mmc_host { 293 struct device *parent; 294 struct device class_dev; 295 int index; 296 const struct mmc_host_ops *ops; 297 struct mmc_pwrseq *pwrseq; 298 unsigned int f_min; 299 unsigned int f_max; 300 unsigned int f_init; 301 u32 ocr_avail; 302 u32 ocr_avail_sdio; /* SDIO-specific OCR */ 303 u32 ocr_avail_sd; /* SD-specific OCR */ 304 u32 ocr_avail_mmc; /* MMC-specific OCR */ 305 struct wakeup_source *ws; /* Enable consume of uevents */ 306 u32 max_current_330; 307 u32 max_current_300; 308 u32 max_current_180; 309 310 #define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */ 311 #define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */ 312 #define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */ 313 #define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */ 314 #define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */ 315 #define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */ 316 #define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */ 317 #define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */ 318 #define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */ 319 #define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */ 320 #define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */ 321 #define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */ 322 #define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */ 323 #define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */ 324 #define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */ 325 #define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */ 326 #define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */ 327 328 u32 caps; /* Host capabilities */ 329 330 #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */ 331 #define MMC_CAP_MMC_HIGHSPEED (1 << 1) /* Can do MMC high-speed timing */ 332 #define MMC_CAP_SD_HIGHSPEED (1 << 2) /* Can do SD high-speed timing */ 333 #define MMC_CAP_SDIO_IRQ (1 << 3) /* Can signal pending SDIO IRQs */ 334 #define MMC_CAP_SPI (1 << 4) /* Talks only SPI protocols */ 335 #define MMC_CAP_NEEDS_POLL (1 << 5) /* Needs polling for card-detection */ 336 #define MMC_CAP_8_BIT_DATA (1 << 6) /* Can the host do 8 bit transfers */ 337 #define MMC_CAP_AGGRESSIVE_PM (1 << 7) /* Suspend (e)MMC/SD at idle */ 338 #define MMC_CAP_NONREMOVABLE (1 << 8) /* Nonremovable e.g. eMMC */ 339 #define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is busy */ 340 #define MMC_CAP_3_3V_DDR (1 << 11) /* Host supports eMMC DDR 3.3V */ 341 #define MMC_CAP_1_8V_DDR (1 << 12) /* Host supports eMMC DDR 1.8V */ 342 #define MMC_CAP_1_2V_DDR (1 << 13) /* Host supports eMMC DDR 1.2V */ 343 #define MMC_CAP_DDR (MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR | \ 344 MMC_CAP_1_2V_DDR) 345 #define MMC_CAP_POWER_OFF_CARD (1 << 14) /* Can power off after boot */ 346 #define MMC_CAP_BUS_WIDTH_TEST (1 << 15) /* CMD14/CMD19 bus width ok */ 347 #define MMC_CAP_UHS_SDR12 (1 << 16) /* Host supports UHS SDR12 mode */ 348 #define MMC_CAP_UHS_SDR25 (1 << 17) /* Host supports UHS SDR25 mode */ 349 #define MMC_CAP_UHS_SDR50 (1 << 18) /* Host supports UHS SDR50 mode */ 350 #define MMC_CAP_UHS_SDR104 (1 << 19) /* Host supports UHS SDR104 mode */ 351 #define MMC_CAP_UHS_DDR50 (1 << 20) /* Host supports UHS DDR50 mode */ 352 #define MMC_CAP_UHS (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | \ 353 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | \ 354 MMC_CAP_UHS_DDR50) 355 #define MMC_CAP_SYNC_RUNTIME_PM (1 << 21) /* Synced runtime PM suspends. */ 356 #define MMC_CAP_NEED_RSP_BUSY (1 << 22) /* Commands with R1B can't use R1. */ 357 #define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */ 358 #define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */ 359 #define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */ 360 #define MMC_CAP_DONE_COMPLETE (1 << 27) /* RW reqs can be completed within mmc_request_done() */ 361 #define MMC_CAP_CD_WAKE (1 << 28) /* Enable card detect wake */ 362 #define MMC_CAP_CMD_DURING_TFR (1 << 29) /* Commands during data transfer */ 363 #define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */ 364 #define MMC_CAP_HW_RESET (1 << 31) /* Reset the eMMC card via RST_n */ 365 366 u32 caps2; /* More host capabilities */ 367 368 #define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */ 369 #define MMC_CAP2_FULL_PWR_CYCLE (1 << 2) /* Can do full power cycle */ 370 #define MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND (1 << 3) /* Can do full power cycle in suspend */ 371 #define MMC_CAP2_HS200_1_8V_SDR (1 << 5) /* can support */ 372 #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */ 373 #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \ 374 MMC_CAP2_HS200_1_2V_SDR) 375 #define MMC_CAP2_SD_EXP (1 << 7) /* SD express via PCIe */ 376 #define MMC_CAP2_SD_EXP_1_2V (1 << 8) /* SD express 1.2V */ 377 #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10) /* Card-detect signal active high */ 378 #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11) /* Write-protect signal active high */ 379 #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */ 380 #define MMC_CAP2_HS400_1_8V (1 << 15) /* Can support HS400 1.8V */ 381 #define MMC_CAP2_HS400_1_2V (1 << 16) /* Can support HS400 1.2V */ 382 #define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \ 383 MMC_CAP2_HS400_1_2V) 384 #define MMC_CAP2_HSX00_1_8V (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V) 385 #define MMC_CAP2_HSX00_1_2V (MMC_CAP2_HS200_1_2V_SDR | MMC_CAP2_HS400_1_2V) 386 #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) 387 #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ 388 #define MMC_CAP2_NO_SDIO (1 << 19) /* Do not send SDIO commands during initialization */ 389 #define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */ 390 #define MMC_CAP2_NO_SD (1 << 21) /* Do not send SD commands during initialization */ 391 #define MMC_CAP2_NO_MMC (1 << 22) /* Do not send (e)MMC commands during initialization */ 392 #define MMC_CAP2_CQE (1 << 23) /* Has eMMC command queue engine */ 393 #define MMC_CAP2_CQE_DCMD (1 << 24) /* CQE can issue a direct command */ 394 #define MMC_CAP2_AVOID_3_3V (1 << 25) /* Host must negotiate down from 3.3V */ 395 #define MMC_CAP2_MERGE_CAPABLE (1 << 26) /* Host can merge a segment over the segment size */ 396 #ifdef CONFIG_MMC_CRYPTO 397 #define MMC_CAP2_CRYPTO (1 << 27) /* Host supports inline encryption */ 398 #else 399 #define MMC_CAP2_CRYPTO 0 400 #endif 401 402 int fixed_drv_type; /* fixed driver type for non-removable media */ 403 404 mmc_pm_flag_t pm_caps; /* supported pm features */ 405 406 /* host specific block data */ 407 unsigned int max_seg_size; /* see blk_queue_max_segment_size */ 408 unsigned short max_segs; /* see blk_queue_max_segments */ 409 unsigned short unused; 410 unsigned int max_req_size; /* maximum number of bytes in one req */ 411 unsigned int max_blk_size; /* maximum size of one mmc block */ 412 unsigned int max_blk_count; /* maximum number of blocks in one req */ 413 unsigned int max_busy_timeout; /* max busy timeout in ms */ 414 415 /* private data */ 416 spinlock_t lock; /* lock for claim and bus ops */ 417 418 struct mmc_ios ios; /* current io bus settings */ 419 420 /* group bitfields together to minimize padding */ 421 unsigned int use_spi_crc:1; 422 unsigned int claimed:1; /* host exclusively claimed */ 423 unsigned int doing_init_tune:1; /* initial tuning in progress */ 424 unsigned int can_retune:1; /* re-tuning can be used */ 425 unsigned int doing_retune:1; /* re-tuning in progress */ 426 unsigned int retune_now:1; /* do re-tuning at next req */ 427 unsigned int retune_paused:1; /* re-tuning is temporarily disabled */ 428 unsigned int retune_crc_disable:1; /* don't trigger retune upon crc */ 429 unsigned int can_dma_map_merge:1; /* merging can be used */ 430 431 int rescan_disable; /* disable card detection */ 432 int rescan_entered; /* used with nonremovable devices */ 433 434 int need_retune; /* re-tuning is needed */ 435 int hold_retune; /* hold off re-tuning */ 436 unsigned int retune_period; /* re-tuning period in secs */ 437 struct timer_list retune_timer; /* for periodic re-tuning */ 438 439 bool trigger_card_event; /* card_event necessary */ 440 441 struct mmc_card *card; /* device attached to this host */ 442 443 wait_queue_head_t wq; 444 struct mmc_ctx *claimer; /* context that has host claimed */ 445 int claim_cnt; /* "claim" nesting count */ 446 struct mmc_ctx default_ctx; /* default context */ 447 448 struct delayed_work detect; 449 int detect_change; /* card detect flag */ 450 struct mmc_slot slot; 451 452 const struct mmc_bus_ops *bus_ops; /* current bus driver */ 453 454 unsigned int sdio_irqs; 455 struct task_struct *sdio_irq_thread; 456 struct delayed_work sdio_irq_work; 457 bool sdio_irq_pending; 458 atomic_t sdio_irq_thread_abort; 459 460 mmc_pm_flag_t pm_flags; /* requested pm features */ 461 462 struct led_trigger *led; /* activity led */ 463 464 #ifdef CONFIG_REGULATOR 465 bool regulator_enabled; /* regulator state */ 466 #endif 467 struct mmc_supply supply; 468 469 struct dentry *debugfs_root; 470 471 /* Ongoing data transfer that allows commands during transfer */ 472 struct mmc_request *ongoing_mrq; 473 474 #ifdef CONFIG_FAIL_MMC_REQUEST 475 struct fault_attr fail_mmc_request; 476 #endif 477 478 unsigned int actual_clock; /* Actual HC clock rate */ 479 480 unsigned int slotno; /* used for sdio acpi binding */ 481 482 int dsr_req; /* DSR value is valid */ 483 u32 dsr; /* optional driver stage (DSR) value */ 484 485 /* Command Queue Engine (CQE) support */ 486 const struct mmc_cqe_ops *cqe_ops; 487 void *cqe_private; 488 int cqe_qdepth; 489 bool cqe_enabled; 490 bool cqe_on; 491 492 /* Inline encryption support */ 493 #ifdef CONFIG_MMC_CRYPTO 494 struct blk_keyslot_manager ksm; 495 #endif 496 497 /* Host Software Queue support */ 498 bool hsq_enabled; 499 500 unsigned long private[] ____cacheline_aligned; 501 }; 502 503 struct device_node; 504 505 struct mmc_host *mmc_alloc_host(int extra, struct device *); 506 int mmc_add_host(struct mmc_host *); 507 void mmc_remove_host(struct mmc_host *); 508 void mmc_free_host(struct mmc_host *); 509 void mmc_of_parse_clk_phase(struct mmc_host *host, 510 struct mmc_clk_phase_map *map); 511 int mmc_of_parse(struct mmc_host *host); 512 int mmc_of_parse_voltage(struct mmc_host *host, u32 *mask); 513 514 static inline void *mmc_priv(struct mmc_host *host) 515 { 516 return (void *)host->private; 517 } 518 519 static inline struct mmc_host *mmc_from_priv(void *priv) 520 { 521 return container_of(priv, struct mmc_host, private); 522 } 523 524 #define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI) 525 526 #define mmc_dev(x) ((x)->parent) 527 #define mmc_classdev(x) (&(x)->class_dev) 528 #define mmc_hostname(x) (dev_name(&(x)->class_dev)) 529 530 void mmc_detect_change(struct mmc_host *, unsigned long delay); 531 void mmc_request_done(struct mmc_host *, struct mmc_request *); 532 void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq); 533 534 void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq); 535 536 /* 537 * May be called from host driver's system/runtime suspend/resume callbacks, 538 * to know if SDIO IRQs has been claimed. 539 */ 540 static inline bool sdio_irq_claimed(struct mmc_host *host) 541 { 542 return host->sdio_irqs > 0; 543 } 544 545 static inline void mmc_signal_sdio_irq(struct mmc_host *host) 546 { 547 host->ops->enable_sdio_irq(host, 0); 548 host->sdio_irq_pending = true; 549 if (host->sdio_irq_thread) 550 wake_up_process(host->sdio_irq_thread); 551 } 552 553 void sdio_signal_irq(struct mmc_host *host); 554 555 #ifdef CONFIG_REGULATOR 556 int mmc_regulator_set_ocr(struct mmc_host *mmc, 557 struct regulator *supply, 558 unsigned short vdd_bit); 559 int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios); 560 #else 561 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc, 562 struct regulator *supply, 563 unsigned short vdd_bit) 564 { 565 return 0; 566 } 567 568 static inline int mmc_regulator_set_vqmmc(struct mmc_host *mmc, 569 struct mmc_ios *ios) 570 { 571 return -EINVAL; 572 } 573 #endif 574 575 int mmc_regulator_get_supply(struct mmc_host *mmc); 576 577 static inline int mmc_card_is_removable(struct mmc_host *host) 578 { 579 return !(host->caps & MMC_CAP_NONREMOVABLE); 580 } 581 582 static inline int mmc_card_keep_power(struct mmc_host *host) 583 { 584 return host->pm_flags & MMC_PM_KEEP_POWER; 585 } 586 587 static inline int mmc_card_wake_sdio_irq(struct mmc_host *host) 588 { 589 return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ; 590 } 591 592 /* TODO: Move to private header */ 593 static inline int mmc_card_hs(struct mmc_card *card) 594 { 595 return card->host->ios.timing == MMC_TIMING_SD_HS || 596 card->host->ios.timing == MMC_TIMING_MMC_HS; 597 } 598 599 /* TODO: Move to private header */ 600 static inline int mmc_card_uhs(struct mmc_card *card) 601 { 602 return card->host->ios.timing >= MMC_TIMING_UHS_SDR12 && 603 card->host->ios.timing <= MMC_TIMING_UHS_DDR50; 604 } 605 606 void mmc_retune_timer_stop(struct mmc_host *host); 607 608 static inline void mmc_retune_needed(struct mmc_host *host) 609 { 610 if (host->can_retune) 611 host->need_retune = 1; 612 } 613 614 static inline bool mmc_can_retune(struct mmc_host *host) 615 { 616 return host->can_retune == 1; 617 } 618 619 static inline bool mmc_doing_retune(struct mmc_host *host) 620 { 621 return host->doing_retune == 1; 622 } 623 624 static inline bool mmc_doing_tune(struct mmc_host *host) 625 { 626 return host->doing_retune == 1 || host->doing_init_tune == 1; 627 } 628 629 static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data) 630 { 631 return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 632 } 633 634 int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error); 635 int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode); 636 637 #endif /* LINUX_MMC_HOST_H */ 638