drivers/sdmmc/request.c

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#include <bitops.h>
#include <byteorder.h>
#include <debug.h>
#include <stdbool.h>
#include <string.h>
#include <util.h>
#include <sdmmc/sdmmc.h>
#include "protocol.h"

void sdmmc_req_prep_transfer(struct sdmmc_slot *slot, struct sdmmc_request *req,
                uint32_t lba, uint32_t nr_blocks, bool write)
{
        uint8_t opcode;

        req->block_size = slot->card.block_size;
        req->blocks = nr_blocks;
        req->flags = 0;
        if (write)
                set_bit(SDMMC_REQ_WRITE, &req->flags);

        if (nr_blocks > 1) {
                set_bit(SDMMC_REQ_STOP, &req->flags);
                if (write)
                        opcode = SDMMC_WRITE_MULTIPLE_BLOCK;
                else
                        opcode = SDMMC_READ_MULTIPLE_BLOCK;
        } else {
                if (write)
                        opcode = SDMMC_WRITE_BLOCK;
                else
                        opcode = SDMMC_READ_SINGLE_BLOCK;
        }

        lba = sdmmc_card_block2addr(&slot->card, lba);

        sdmmc_req_prep_cmd(req, opcode, lba, SDMMC_RSP_R1);
}

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