struct sd_card *
mmchs_card_initialize(struct sd_slot *slot)
{
// mmchs_init(1);
struct sd_card *card;
card = &slot->card;
memset(card, 0, sizeof(struct sd_card));
card->slot = slot;
if (card_goto_idle_state()) {
mmc_log_warn(&log, "Failed to go idle state\n");
return NULL;
}
if (card_identification()) {
mmc_log_warn(&log, "Failed to do card_identification\n");
return NULL;
}
if (card_query_voltage_and_type(&slot->card.regs)) {
mmc_log_warn(&log,
"Failed to do card_query_voltage_and_type\n");
return NULL;
}
if (card_identify(&slot->card.regs)) {
mmc_log_warn(&log, "Failed to identify card\n");
return NULL;
}
/* We have now initialized the hardware identified the card */
if (card_csd(&slot->card.regs)) {
mmc_log_warn(&log,
"failed to read csd (card specific data)\n");
return NULL;
}
if (select_card(&slot->card.regs)) {
mmc_log_warn(&log, "Failed to select card\n");
return NULL;
}
if (SD_CSD_READ_BL_LEN(slot->card.regs.csd) != 0x09) {
/* for CSD version 2.0 the value is fixed to 0x09 and means a
* block size of 512 */
mmc_log_warn(&log, "Block size expect to be 512\n");
return NULL;
}
slot->card.blk_size = 512; /* HARDCODED value */
slot->card.blk_count = SD_CSD_V2_CAPACITY(slot->card.regs.csd);
slot->card.state = SD_MODE_DATA_TRANSFER_MODE;
memset(slot->card.part, 0, sizeof(slot->card.part));
memset(slot->card.subpart, 0, sizeof(slot->card.subpart));
slot->card.part[0].dv_base = 0;
slot->card.part[0].dv_size =
(unsigned long long) SD_CSD_V2_CAPACITY(slot->card.regs.csd) * 512;
return &slot->card;
}
int card_csd(struct sd_card *card)
{
/* send_csd -> r2 response */
command.cmd = MMC_SEND_CSD;
command.resp_type = RESP_LEN_136;
command.args = MMC_ARG_RCA(card->rca); /* card rca */
if (mmc_send_cmd(&command)) {
return 1;
}
card->csd[0] = command.resp[0];
card->csd[1] = command.resp[1];
card->csd[2] = command.resp[2];
card->csd[3] = command.resp[3];
int x = SD_CSD_CSDVER(card->csd);
if (SD_CSD_CSDVER(card->csd) != SD_CSD_CSDVER_2_0) {
printf("Version 2.0 of CSD register expected\n");
return 1;
}
/* sanity check */
printf("size = %lu bytes\n", SD_CSD_V2_CAPACITY( card->csd) * 512);
return 0;
}
