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sdio: allow reads/writes with lengths not divisible by 4

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CMD53 in byte mode supports transfers of any number of bytes between 1
and 512. This change removes limitation that the number of bytes must
be divisible by 4. Host quirk, that such transfers must be split into
two commands (one for the aligned part and the other one for
unaligned) is taken into account.
This commit is contained in:
Ivan Grokhotkov
2018-04-20 17:42:13 +08:00
committed by Angus Gratton
parent 97a228e6ab
commit cf81db40a2
3 changed files with 70 additions and 25 deletions
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10
components/driver/sdmmc_transaction.c
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@@ -122,9 +122,10 @@ esp_err_t sdmmc_host_do_transaction(int slot, sdmmc_command_t* cmdinfo)
// convert cmdinfo to hardware register value
sdmmc_hw_cmd_t hw_cmd = make_hw_cmd(cmdinfo);
if (cmdinfo->data) {
if (cmdinfo->datalen < 4 || cmdinfo->blklen % 4 != 0) {
ESP_LOGD(TAG, "%s: invalid size: total=%d block=%d",
__func__, cmdinfo->datalen, cmdinfo->blklen);
// Length should be either <4 or >=4 and =0 (mod 4).
if (cmdinfo->datalen >= 4 && cmdinfo->datalen % 4 != 0) {
ESP_LOGD(TAG, "%s: invalid size: total=%d",
__func__, cmdinfo->datalen);
ret = ESP_ERR_INVALID_SIZE;
goto out;
}
@@ -212,7 +213,8 @@ static void fill_dma_descriptors(size_t num_desc)
desc->owned_by_idmac = 1;
desc->buffer1_ptr = s_cur_transfer.ptr;
desc->next_desc_ptr = (last) ? NULL : &s_dma_desc[(next + 1) % SDMMC_DMA_DESC_CNT];
desc->buffer1_size = size_to_fill;
assert(size_to_fill < 4 || size_to_fill % 4 == 0);
desc->buffer1_size = (size_to_fill + 3) & (~3);
s_cur_transfer.size_remaining -= size_to_fill;
s_cur_transfer.ptr += size_to_fill;