1 /* SPDX-License-Identifier: GPL-2.0-only */
3  *  linux/include/linux/mmc/host.h
12 #include <linux/fault-inject.h>
14 #include <linux/mmc/core.h>
15 #include <linux/mmc/card.h>
16 #include <linux/mmc/pm.h>
17 #include <linux/dma-direction.h>
108 	 * ios->clock might be 0. For some controllers, setting 0Hz
117 	 *   0 for a read/write card
118 	 *   1 for a read-only card
119 	 *   -ENOSYS when not supported (equal to NULL callback)
126 	 *   0 for a absent card
127 	 *   1 for a present card
128 	 *   -ENOSYS when not supported (equal to NULL callback)
138 	void	(*init_card)(struct mmc_host *host, struct mmc_card *card);
142 	/* Check if the card is pulling dat[0:3] low */
163 	int	(*select_drive_strength)(struct mmc_card *card,
166 	/* Reset the eMMC card via RST_n */
174 	int	(*multi_io_quirk)(struct mmc_card *card,
180 	int	(*cqe_enable)(struct mmc_host *host, struct mmc_card *card);
181 	/* Free resources, and make the CQE non-operational */
185 	 * effect of ->cqe_off().
191 	 * Prepare the CQE and host controller to accept non-CQ commands. There
192 	 * is no corresponding ->cqe_on(), instead ->cqe_request() is required
216 	 * (data->error or cmd->error for DCMD).  Requests that did not error
223 	/* active mmc request */
226 	 * Check error status of completed mmc request.
233  * struct mmc_slot - MMC slot functions
235  * @cd_irq:		MMC/SD-card slot hotplug detection IRQ or -EINVAL
236  * @handler_priv:	MMC/SD-card slot context
238  * Some MMC/SD host controllers implement slot-functions like card and
239  * write-protect detection natively. However, a large number of controllers
241  * such slot-function drivers.
250  * mmc_context_info - synchronization details for mmc context
253  * @is_waiting_last_req	mmc context waiting for single running request
267 	struct regulator *vmmc;		/* Card power supply */
285 	u32			ocr_avail_sdio;	/* SDIO-specific OCR */
286 	u32			ocr_avail_sd;	/* SD-specific OCR */
287 	u32			ocr_avail_mmc;	/* MMC-specific OCR */
296 #define MMC_VDD_165_195		0x00000080	/* VDD voltage 1.65 - 1.95 */
317 #define MMC_CAP_MMC_HIGHSPEED	(1 << 1)	/* Can do MMC high-speed timing */
318 #define MMC_CAP_SD_HIGHSPEED	(1 << 2)	/* Can do SD high-speed timing */
321 #define MMC_CAP_NEEDS_POLL	(1 << 5)	/* Needs polling for card-detection */
323 #define MMC_CAP_AGGRESSIVE_PM	(1 << 7)	/* Suspend (e)MMC/SD at idle  */
325 #define MMC_CAP_WAIT_WHILE_BUSY	(1 << 9)	/* Waits while card is busy */
347 #define MMC_CAP_CD_WAKE		(1 << 28)	/* Enable card detect wake */
350 #define MMC_CAP_HW_RESET	(1 << 31)	/* Reset the eMMC card via RST_n */
361 #define MMC_CAP2_CD_ACTIVE_HIGH	(1 << 10)	/* Card-detect signal active high */
362 #define MMC_CAP2_RO_ACTIVE_HIGH	(1 << 11)	/* Write-protect signal active high */
371 …_WRITE_PROTECT (1 << 18)	/* No physical write protect pin, assume that card is always read-write */
375 #define MMC_CAP2_NO_MMC		(1 << 22)	/* Do not send (e)MMC commands during initialization */
381 	int			fixed_drv_type;	/* fixed driver type for non-removable media */
390 	unsigned int		max_blk_size;	/* maximum size of one mmc block */
404 	unsigned int		can_retune:1;	/* re-tuning can be used */
405 	unsigned int		doing_retune:1;	/* re-tuning in progress */
406 	unsigned int		retune_now:1;	/* do re-tuning at next req */
407 	unsigned int		retune_paused:1; /* re-tuning is temporarily disabled */
408 	unsigned int		use_blk_mq:1;	/* use blk-mq */
412 	int			rescan_disable;	/* disable card detection */
415 	int			need_retune;	/* re-tuning is needed */
416 	int			hold_retune;	/* hold off re-tuning */
417 	unsigned int		retune_period;	/* re-tuning period in secs */
418 	struct timer_list	retune_timer;	/* for periodic re-tuning */
422 	struct mmc_card		*card;		/* device attached to this host */  member
430 	int			detect_change;	/* card detect flag */
491 	return (void *)host->private;  in mmc_priv()
499 #define mmc_host_is_spi(host)	((host)->caps & MMC_CAP_SPI)
501 #define mmc_dev(x)	((x)->parent)
502 #define mmc_classdev(x)	(&(x)->class_dev)
503 #define mmc_hostname(x)	(dev_name(&(x)->class_dev))
517 	return host->sdio_irqs > 0;  in sdio_irq_claimed()
522 	host->ops->enable_sdio_irq(host, 0);  in mmc_signal_sdio_irq()
523 	host->sdio_irq_pending = true;  in mmc_signal_sdio_irq()
524 	if (host->sdio_irq_thread)  in mmc_signal_sdio_irq()
525 		wake_up_process(host->sdio_irq_thread);  in mmc_signal_sdio_irq()
531 int mmc_regulator_set_ocr(struct mmc_host *mmc,
534 int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios);
536 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,  in mmc_regulator_set_ocr()  argument
543 static inline int mmc_regulator_set_vqmmc(struct mmc_host *mmc,  in mmc_regulator_set_vqmmc()  argument
546 	return -EINVAL;  in mmc_regulator_set_vqmmc()
550 int mmc_regulator_get_supply(struct mmc_host *mmc);
554 	return !(host->caps & MMC_CAP_NONREMOVABLE);  in mmc_card_is_removable()
559 	return host->pm_flags & MMC_PM_KEEP_POWER;  in mmc_card_keep_power()
564 	return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;  in mmc_card_wake_sdio_irq()
568 static inline int mmc_card_hs(struct mmc_card *card)  in mmc_card_hs()  argument
570 	return card->host->ios.timing == MMC_TIMING_SD_HS ||  in mmc_card_hs()
571 		card->host->ios.timing == MMC_TIMING_MMC_HS;  in mmc_card_hs()
575 static inline int mmc_card_uhs(struct mmc_card *card)  in mmc_card_uhs()  argument
577 	return card->host->ios.timing >= MMC_TIMING_UHS_SDR12 &&  in mmc_card_uhs()
578 		card->host->ios.timing <= MMC_TIMING_UHS_DDR50;  in mmc_card_uhs()
585 	if (host->can_retune)  in mmc_retune_needed()
586 		host->need_retune = 1;  in mmc_retune_needed()
591 	return host->can_retune == 1;  in mmc_can_retune()
596 	return host->doing_retune == 1;  in mmc_doing_retune()
601 	return host->doing_retune == 1 || host->doing_init_tune == 1;  in mmc_doing_tune()
606 	return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;  in mmc_get_dma_dir()