rt_err_t mmcsd_send_app_cmd(struct rt_mmcsd_host *host,
struct rt_mmcsd_card *card,
struct rt_mmcsd_cmd *cmd,
int retry)
{
struct rt_mmcsd_req req;
rt_uint32_t i;
rt_err_t err;
err = -RT_ERROR;
/*
* We have to resend MMC_APP_CMD for each attempt so
* we cannot use the retries field in mmc_command.
*/
for (i = 0;i <= retry;i++)
{
rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
err = mmcsd_app_cmd(host, card);
if (err)
{
/* no point in retrying; no APP commands allowed */
if (controller_is_spi(host))
{
if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
break;
}
continue;
}
rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
rt_memset(cmd->resp, 0, sizeof(cmd->resp));
req.cmd = cmd;
//cmd->data = NULL;
mmcsd_send_request(host, &req);
err = cmd->err;
if (!cmd->err)
break;
/* no point in retrying illegal APP commands */
if (controller_is_spi(host))
{
if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
break;
}
}
return err;
}
rt_int32_t mmcsd_get_scr(struct rt_mmcsd_card *card, rt_uint32_t *scr)
{
rt_int32_t err;
struct rt_mmcsd_req req;
struct rt_mmcsd_cmd cmd;
struct rt_mmcsd_data data;
err = mmcsd_app_cmd(card->host, card);
if (err)
return err;
rt_memset(&req, 0, sizeof(struct rt_mmcsd_req));
rt_memset(&cmd, 0, sizeof(struct rt_mmcsd_cmd));
rt_memset(&data, 0, sizeof(struct rt_mmcsd_data));
req.cmd = &cmd;
req.data = &data;
cmd.cmd_code = SD_APP_SEND_SCR;
cmd.arg = 0;
cmd.flags = RESP_SPI_R1 | RESP_R1 | CMD_ADTC;
data.blksize = 8;
data.blks = 1;
data.flags = DATA_DIR_READ;
data.buf = scr;
mmcsd_set_data_timeout(&data, card);
mmcsd_send_request(card->host, &req);
if (cmd.err)
return cmd.err;
if (data.err)
return data.err;
scr[0] = be32_to_cpu(scr[0]);
scr[1] = be32_to_cpu(scr[1]);
return 0;
}
int mmcsd_app_send_op_cond(long long arg, short crc_check) {
mmcsd_app_cmd(crc_check);
mmcsd_send_cmd(41, arg, crc_check);
return mmcsd_get_r1();
}
