From 318a7a576bc49aa8b4207e694d3fbd48c663d6ac Mon Sep 17 00:00:00 2001 From: Jean-Jacques Hiblot Date: Thu, 21 Sep 2017 16:30:01 +0200 Subject: mmc: Add a new callback function to perform the 74 clocks cycle sequence Add a new callback function *send_init_stream* which start a sequence of at least 74 clock cycles. The mmc core uses *mmc_send_init_stream* in order to invoke the callback function. This will be used during power cycle where the specification requires such a sequence after power up. Signed-off-by: Jean-Jacques Hiblot --- include/mmc.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include') diff --git a/include/mmc.h b/include/mmc.h index e5249637c85..bd096aeb218 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -360,6 +360,14 @@ struct dm_mmc_ops { */ int (*set_ios)(struct udevice *dev); + /** + * send_init_stream() - send the initialization stream: 74 clock cycles + * This is used after power up before sending the first command + * + * @dev: Device to update + */ + void (*send_init_stream)(struct udevice *dev); + /** * get_cd() - See whether a card is present * @@ -382,11 +390,13 @@ struct dm_mmc_ops { int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data); int dm_mmc_set_ios(struct udevice *dev); +void dm_mmc_send_init_stream(struct udevice *dev); int dm_mmc_get_cd(struct udevice *dev); int dm_mmc_get_wp(struct udevice *dev); /* Transition functions for compatibility */ int mmc_set_ios(struct mmc *mmc); +void mmc_send_init_stream(struct mmc *mmc); int mmc_getcd(struct mmc *mmc); int mmc_getwp(struct mmc *mmc); -- cgit v1.3.1