diff options
Diffstat (limited to 'backport-include/linux/mmc/sdio_func.h')
-rw-r--r-- | backport-include/linux/mmc/sdio_func.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/backport-include/linux/mmc/sdio_func.h b/backport-include/linux/mmc/sdio_func.h new file mode 100644 index 0000000..0a67f99 --- /dev/null +++ b/backport-include/linux/mmc/sdio_func.h @@ -0,0 +1,86 @@ +#ifndef __BACKPORT_MMC_SDIO_FUNC_H +#define __BACKPORT_MMC_SDIO_FUNC_H +#include <linux/version.h> +#include_next <linux/mmc/sdio_func.h> + +#ifndef dev_to_sdio_func +#define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) +#endif + +#if LINUX_VERSION_IS_LESS(5,2,0) && \ + !LINUX_VERSION_IN_RANGE(5,1,15, 5,2,0) && \ + !LINUX_VERSION_IN_RANGE(4,19,56, 4,20,0) + +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> + +/** + * sdio_retune_hold_now - start deferring retuning requests till release + * @func: SDIO function attached to host + * + * This function can be called if it's currently a bad time to do + * a retune of the SDIO card. Retune requests made during this time + * will be held and we'll actually do the retune sometime after the + * release. + * + * This function could be useful if an SDIO card is in a power state + * where it can respond to a small subset of commands that doesn't + * include the retuning command. Care should be taken when using + * this function since (presumably) the retuning request we might be + * deferring was made for a good reason. + * + * This function should be called while the host is claimed. + */ +#define sdio_retune_hold_now LINUX_BACKPORT(sdio_retune_hold_now) +#if LINUX_VERSION_IS_LESS(4,3,0) +static inline void sdio_retune_hold_now(struct sdio_func *func) +{ +} +#else +static inline void sdio_retune_hold_now(struct sdio_func *func) +{ + struct mmc_host *host = func->card->host; + + host->retune_now = 0; + host->hold_retune += 1; +} +#endif /* < 4.3 */ + +/** + * sdio_retune_release - signal that it's OK to retune now + * @func: SDIO function attached to host + * + * This is the complement to sdio_retune_hold_now(). Calling this + * function won't make a retune happen right away but will allow + * them to be scheduled normally. + * + * This function should be called while the host is claimed. + */ +#define sdio_retune_release LINUX_BACKPORT(sdio_retune_release) +#if LINUX_VERSION_IS_LESS(4,3,0) +static inline void sdio_retune_release(struct sdio_func *func) +{ +} +#else +static inline void sdio_retune_release(struct sdio_func *func) +{ + struct mmc_host *host = func->card->host; + + if (host->hold_retune) + host->hold_retune -= 1; + else + WARN_ON(1); +} +#endif + +#define sdio_retune_crc_disable LINUX_BACKPORT(sdio_retune_crc_disable) +static inline void sdio_retune_crc_disable(struct sdio_func *func) +{ +} +#define sdio_retune_crc_enable LINUX_BACKPORT(sdio_retune_crc_enable) +static inline void sdio_retune_crc_enable(struct sdio_func *func) +{ +} +#endif /* < 5.2 */ + +#endif /* __BACKPORT_MMC_SDIO_FUNC_H */ |