static int mmc_sdio_init_card(struct mmc_host *host)
{
int i = 0, ret = 0;
__u32 rocr;
ret = mmc_io_rw_direct(host, 1, 0, 6, 8, NULL);
for (i = 0; i < 10; i++) {
ret = mmc_send_io_op_cond(host, 0, &rocr);
if (!(host->resp[0] & (7 << 28)))
return -1;
ret = mmc_send_io_op_cond(host, rocr, &rocr);
if (host->resp[0] & 0x80000000)
break;
}
ret = mmc_set_relative_addr(host);
DPRINT("rca = %d\n", host->card.rca);
ret = mmc_select_card(host);
ret = sdio_read_cccr(host);
ret = sdio_read_cis(host);
return ret;
}
/*
* Handle the detection and initialisation of a card.
*
* In the case of a resume, "oldcard" will contain the card
* we're trying to reinitialise.
*/
static int32 mmc_sdio_init_card(void *card)
{
SDM_CARD_INFO* pCard;
int err = SDC_SUCCESS;
pCard = (SDM_CARD_INFO*)card;
/*
* Sanity check the voltages that the card claims to support.
*/
if (pCard->ocr & 0xFF)
pCard->ocr &= ~0xFF;
/*
* Inform the card of the voltage
*/
err = mmc_send_io_op_cond(card, pCard->ocr&USER_SUPPORT_VOLTAGE, NULL);
if (err)
goto remove;
/*
* For native busses: set card RCA and quit open drain mode.
*/
err = mmc_send_relative_addr(card, NULL);
if (err)
goto remove;
/*
* Select card, as all following commands rely on that.
*/
err = mmc_select_card(card, NULL);
if (err)
goto remove;
/*
* Read the common registers.
*/
err = sdio_read_cccr(card);
if (err)
goto remove;
/*
* Read the common CIS tuples.
*/
err = sdio_read_common_cis(card);
if (err)
goto remove;
/*
* If needed, disconnect card detection pull-up resistor.
*/
err = sdio_disable_cd(card);
if (err)
goto remove;
/*
* Switch to high-speed (if supported).
* err == 0/1 [not]support high speed.
*/
err = sdio_enable_hs(card);
if (err > 0)
mmc_card_set_highspeed(pCard); // success to enable high speed.
else if (err)
goto remove;
/*
* Change to the card's maximum speed.
*/
err = SDIOC_UpdateFreq(pCard->SDCPort, SD_FPP_FREQ);//SD_FPP_FREQ SDHC_FPP_FREQ
if (SDC_SUCCESS != err)
goto remove;
pCard->TranSpeed = SD_FPP_FREQ;
pCard->WorkMode |= SDM_HIGH_SPEED_MODE;
/*
* Switch to wider bus (if supported).
*/
err = sdio_enable_4bit_bus(card);
if (err > 0)
; //success to switch 4 bits wide.
else if (err)
goto remove;
return 0;
remove:
return err;
}
