drivers/mmc/core/host.h

Source file repositories/reference/linux-study-clean/drivers/mmc/core/host.h

File Facts

System
Linux kernel
Corpus path
drivers/mmc/core/host.h
Extension
.h
Size
2066 bytes
Lines
90
Domain
Driver Families
Bucket
drivers/mmc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _MMC_CORE_HOST_H
#define _MMC_CORE_HOST_H

#include <linux/mmc/host.h>

int mmc_register_host_class(void);
void mmc_unregister_host_class(void);

void mmc_retune_enable(struct mmc_host *host);
void mmc_retune_disable(struct mmc_host *host);
void mmc_retune_hold(struct mmc_host *host);
void mmc_retune_release(struct mmc_host *host);
int mmc_retune(struct mmc_host *host);
void mmc_retune_pause(struct mmc_host *host);
void mmc_retune_unpause(struct mmc_host *host);

static inline void mmc_retune_clear(struct mmc_host *host)
{
	host->retune_now = 0;
	host->need_retune = 0;
}

static inline void mmc_retune_hold_now(struct mmc_host *host)
{
	host->retune_now = 0;
	host->hold_retune += 1;
}

static inline void mmc_retune_recheck(struct mmc_host *host)
{
	if (host->hold_retune <= 1)
		host->retune_now = 1;
}

static inline int mmc_host_can_cmd23(struct mmc_host *host)
{
	return host->caps & MMC_CAP_CMD23;
}

static inline bool mmc_host_can_done_complete(struct mmc_host *host)
{
	return host->caps & MMC_CAP_DONE_COMPLETE;
}

static inline int mmc_host_can_access_boot(struct mmc_host *host)
{
	return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
}

static inline int mmc_host_can_uhs(struct mmc_host *host)
{
	return host->caps & MMC_CAP_UHS;
}

static inline bool mmc_card_hs200(struct mmc_card *card)
{
	return card->host->ios.timing == MMC_TIMING_MMC_HS200;
}

static inline bool mmc_card_ddr52(struct mmc_card *card)
{
	return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
}

static inline bool mmc_card_hs400(struct mmc_card *card)
{
	return card->host->ios.timing == MMC_TIMING_MMC_HS400;
}

static inline bool mmc_card_hs400es(struct mmc_card *card)
{
	return card->host->ios.enhanced_strobe;
}

static inline bool mmc_card_sd_express(struct mmc_host *host)
{
	return host->ios.timing == MMC_TIMING_SD_EXP ||
		host->ios.timing == MMC_TIMING_SD_EXP_1_2V;
}

#endif

Annotation

Implementation Notes