Hi Avri,
在 2024/8/14 15:29, Avri Altman 写道:
@@ -948,13 +949,20 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
int err;
u32 result;
__be32 *blocks;
-
+ u8 resp_sz;
struct mmc_request mrq = {};
struct mmc_command cmd = {};
struct mmc_data data = {};
-
struct scatterlist sg;
+ /*
+ * SD cards, specifically high volume cards, expect to be allowed with the
+ * full 500msec busy period post write. Otherwise, they may not indicate
+ * correctly the number of bytes written.
+ */
+ if (mmc_card_is_sduc(card->host))
+ mmc_delay(500);
Could you kindly point me to the right section of SD spec which states
this 500ms before ACMD22 ? Is it the write busy time?
And as you mentioned high volume cards, I am curious if 1TB sandisk
MircoSDXC need 500ms delay as well?
