diff options
Diffstat (limited to 'include/mmc.h')
| -rw-r--r-- | include/mmc.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/mmc.h b/include/mmc.h index e92e9205600..5e9d15cb41a 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -491,6 +491,19 @@ struct dm_mmc_ops { * @return 0 if not present, 1 if present, -ve on error */ int (*host_power_cycle)(struct udevice *dev); + + /** + * get_b_max - get maximum length of single transfer + * Called before reading blocks from the card, + * useful for system which have e.g. DMA limits + * on various memory ranges. + * + * @dev: Device to check + * @dst: Destination buffer in memory + * @blkcnt: Total number of blocks in this transfer + * @return maximum number of blocks for this transfer + */ + int (*get_b_max)(struct udevice *dev, void *dst, lbaint_t blkcnt); }; #define mmc_get_ops(dev) ((struct dm_mmc_ops *)(dev)->driver->ops) @@ -504,6 +517,7 @@ int dm_mmc_execute_tuning(struct udevice *dev, uint opcode); int dm_mmc_wait_dat0(struct udevice *dev, int state, int timeout_us); int dm_mmc_host_power_cycle(struct udevice *dev); int dm_mmc_deferred_probe(struct udevice *dev); +int dm_mmc_get_b_max(struct udevice *dev, void *dst, lbaint_t blkcnt); /* Transition functions for compatibility */ int mmc_set_ios(struct mmc *mmc); @@ -514,6 +528,7 @@ int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us); int mmc_set_enhanced_strobe(struct mmc *mmc); int mmc_host_power_cycle(struct mmc *mmc); int mmc_deferred_probe(struct mmc *mmc); +int mmc_get_b_max(struct mmc *mmc, void *dst, lbaint_t blkcnt); #else struct mmc_ops { @@ -524,6 +539,7 @@ struct mmc_ops { int (*getcd)(struct mmc *mmc); int (*getwp)(struct mmc *mmc); int (*host_power_cycle)(struct mmc *mmc); + int (*get_b_max)(struct mmc *mmc, void *dst, lbaint_t blkcnt); }; #endif |