diff options
Diffstat (limited to 'include/linux/mmc/host.h')
| -rw-r--r-- | include/linux/mmc/host.h | 49 |
1 files changed, 39 insertions, 10 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 8dd4d290ab0d..aa4bfbf129e4 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -19,6 +19,7 @@ #include <linux/mmc/core.h> #include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> #include <linux/mmc/pm.h> struct mmc_ios { @@ -77,6 +78,8 @@ struct mmc_ios { #define MMC_SET_DRIVER_TYPE_A 1 #define MMC_SET_DRIVER_TYPE_C 2 #define MMC_SET_DRIVER_TYPE_D 3 + + bool enhanced_strobe; /* hs400es selection */ }; struct mmc_host_ops { @@ -93,28 +96,39 @@ struct mmc_host_ops { void (*pre_req)(struct mmc_host *host, struct mmc_request *req, bool is_first_req); void (*request)(struct mmc_host *host, struct mmc_request *req); + + /* + * Avoid calling the next three functions too often or in a "fast + * path", since underlaying controller might implement them in an + * expensive and/or slow way. Also note that these functions might + * sleep, so don't call them in the atomic contexts! + */ + + /* + * Notes to the set_ios callback: + * ios->clock might be 0. For some controllers, setting 0Hz + * as any other frequency works. However, some controllers + * explicitly need to disable the clock. Otherwise e.g. voltage + * switching might fail because the SDCLK is not really quiet. + */ + void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios); + /* - * Avoid calling these three functions too often or in a "fast path", - * since underlaying controller might implement them in an expensive - * and/or slow way. - * - * Also note that these functions might sleep, so don't call them - * in the atomic contexts! - * * Return values for the get_ro callback should be: * 0 for a read/write card * 1 for a read-only card * -ENOSYS when not supported (equal to NULL callback) * or a negative errno value when something bad happened - * + */ + int (*get_ro)(struct mmc_host *host); + + /* * Return values for the get_cd callback should be: * 0 for a absent card * 1 for a present card * -ENOSYS when not supported (equal to NULL callback) * or a negative errno value when something bad happened */ - void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios); - int (*get_ro)(struct mmc_host *host); int (*get_cd)(struct mmc_host *host); void (*enable_sdio_irq)(struct mmc_host *host, int enable); @@ -132,6 +146,9 @@ struct mmc_host_ops { /* Prepare HS400 target operating frequency depending host driver */ int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios); + /* Prepare enhanced strobe depending host driver */ + void (*hs400_enhanced_strobe)(struct mmc_host *host, + struct mmc_ios *ios); int (*select_drive_strength)(struct mmc_card *card, unsigned int max_dtr, int host_drv, int card_drv, int *drv_type); @@ -291,6 +308,9 @@ struct mmc_host { #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ #define MMC_CAP2_NO_SDIO (1 << 19) /* Do not send SDIO commands during initialization */ +#define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */ +#define MMC_CAP2_NO_SD (1 << 21) /* Do not send SD commands during initialization */ +#define MMC_CAP2_NO_MMC (1 << 22) /* Do not send (e)MMC commands during initialization */ mmc_pm_flag_t pm_caps; /* supported pm features */ @@ -318,6 +338,7 @@ struct mmc_host { unsigned int can_retune:1; /* re-tuning can be used */ unsigned int doing_retune:1; /* re-tuning in progress */ unsigned int retune_now:1; /* do re-tuning at next req */ + unsigned int retune_paused:1; /* re-tuning is temporarily disabled */ int rescan_disable; /* disable card detection */ int rescan_entered; /* used with nonremovable devices */ @@ -501,6 +522,11 @@ 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; +} + void mmc_retune_timer_stop(struct mmc_host *host); static inline void mmc_retune_needed(struct mmc_host *host) @@ -515,4 +541,7 @@ static inline void mmc_retune_recheck(struct mmc_host *host) host->retune_now = 1; } +void mmc_retune_pause(struct mmc_host *host); +void mmc_retune_unpause(struct mmc_host *host); + #endif /* LINUX_MMC_HOST_H */ |