int ReinitSDIO(struct hif_device *device)
{
s32 err;
struct mmc_host *host;
struct mmc_card *card;
struct sdio_func *func;
u8 cmd52_resp;
u32 clock;
func = device->func;
card = func->card;
host = card->host;
AR_DEBUG_PRINTF(ATH_DEBUG_TRACE, ("AR6000: +ReinitSDIO \n"));
sdio_claim_host(func);
do {
if (!device->is_suspend) {
u32 resp;
u16 rca;
u32 i;
int bit = fls(host->ocr_avail) - 1;
/* emulate the mmc_power_up(...) */
host->ios.vdd = bit;
host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
host->ios.power_mode = MMC_POWER_UP;
host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ios.timing = MMC_TIMING_LEGACY;
host->ops->set_ios(host, &host->ios);
/*
* This delay should be sufficient to allow the power supply
* to reach the minimum voltage.
*/
msleep(2);
host->ios.clock = host->f_min;
host->ios.power_mode = MMC_POWER_ON;
host->ops->set_ios(host, &host->ios);
/*
* This delay must be at least 74 clock sizes, or 1 ms, or the
* time required to reach a stable voltage.
*/
msleep(2);
/* Issue CMD0. Goto idle state */
host->ios.chip_select = MMC_CS_HIGH;
host->ops->set_ios(host, &host->ios);
msleep(1);
err = IssueSDCommand(device, MMC_GO_IDLE_STATE, 0, (MMC_RSP_NONE | MMC_CMD_BC), NULL);
host->ios.chip_select = MMC_CS_DONTCARE;
host->ops->set_ios(host, &host->ios);
msleep(1);
host->use_spi_crc = 0;
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD0 failed : %d \n",err));
break;
}
if (!host->ocr) {
/* Issue CMD5, arg = 0 */
err = IssueSDCommand(device, SD_IO_SEND_OP_COND, 0, (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD5 failed : %d \n",err));
break;
}
host->ocr = resp;
}
/* Issue CMD5, arg = ocr. Wait till card is ready */
for (i=0;i<100;i++) {
err = IssueSDCommand(device, SD_IO_SEND_OP_COND, host->ocr, (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD5 failed : %d \n",err));
break;
}
if (resp & MMC_CARD_BUSY) {
break;
}
msleep(10);
}
if ((i == 100) || (err)) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: card in not ready : %d %d \n",i,err));
break;
}
/* Issue CMD3, get RCA */
err = IssueSDCommand(device, SD_SEND_RELATIVE_ADDR, 0, MMC_RSP_R6 | MMC_CMD_BCR, &resp);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD3 failed : %d \n",err));
break;
}
rca = resp >> 16;
host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
host->ops->set_ios(host, &host->ios);
/* Issue CMD7, select card */
err = IssueSDCommand(device, MMC_SELECT_CARD, (rca << 16), MMC_RSP_R1 | MMC_CMD_AC, NULL);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD7 failed : %d \n",err));
break;
}
}
/* Enable high speed */
if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
AR_DEBUG_PRINTF(ATH_DEBUG_TRACE, ("ReinitSDIO: Set high speed mode\n"));
err = Func0_CMD52ReadByte(card, SDIO_CCCR_SPEED, &cmd52_resp);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD52 read to CCCR speed register failed : %d \n",err));
card->state &= ~MMC_STATE_HIGHSPEED;
/* no need to break */
} else {
err = Func0_CMD52WriteByte(card, SDIO_CCCR_SPEED, (cmd52_resp | SDIO_SPEED_EHS));
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD52 write to CCCR speed register failed : %d \n",err));
break;
}
mmc_card_set_highspeed(card);
host->ios.timing = MMC_TIMING_SD_HS;
host->ops->set_ios(host, &host->ios);
}
}
/* Set clock */
if (mmc_card_highspeed(card)) {
clock = 50000000;
} else {
clock = card->cis.max_dtr;
}
if (clock > host->f_max) {
clock = host->f_max;
}
host->ios.clock = clock;
host->ops->set_ios(host, &host->ios);
if (card->host->caps & MMC_CAP_4_BIT_DATA) {
/* CMD52: Set bus width & disable card detect resistor */
err = Func0_CMD52WriteByte(card, SDIO_CCCR_IF, SDIO_BUS_CD_DISABLE | SDIO_BUS_WIDTH_4BIT);
if (err) {
AR_DEBUG_PRINTF(ATH_DEBUG_ERR, ("ReinitSDIO: CMD52 to set bus mode failed : %d \n",err));
break;
}
host->ios.bus_width = MMC_BUS_WIDTH_4;
host->ops->set_ios(host, &host->ios);
}
} while (0);
static A_STATUS ReinitSDIO(HIF_DEVICE *device)
{
A_STATUS status = A_OK;
SD_COMMAND_RESPONSE response;
A_UINT32 ocr;
int cardReadyRetry = 10;
A_UINT16 rca;
A_UINT8 cmd52Data;
do {
if (!IssueSDCommand(device->handle,0,0,NoResponse,NULL)) {
break;
}
AR_DEBUG_PRINTF(DBG_TRACE,("Issuing first CMD5 ... \n"));
/* issue CMD5, ARG=0 */
if (!IssueSDCommand(device->handle,5,0,ResponseR4,&response)) {
AR_DEBUG_PRINTF(DBG_TRACE,("CMD5 FAILED, NO card detected \n"));
break;
}
ocr = SD_SDIO_R4_GET_OCR(response.ResponseBuffer);
AR_DEBUG_PRINTF(DBG_TRACE,("CMD5 success, OCR = 0x%X \n",ocr));
/* issue CMD5, ARG=0x00100000 repeatedly until card is ready */
while (cardReadyRetry) {
if (!IssueSDCommand(device->handle,
5,
0x00100000, /* use 3.0 volts, although this really is a don't care */
ResponseR4,
&response)) {
AR_DEBUG_PRINTF(DBG_ERR,("CMD5 Failed \n"));
cardReadyRetry = 0;
break;
}
if (SD_SDIO_R4_IS_CARD_READY(response.ResponseBuffer)) {
AR_DEBUG_PRINTF(DBG_TRACE,("SDIO Card is Ready! \n"));
break;
}
cardReadyRetry--;
Sleep(10);
}
if (cardReadyRetry == 0) {
AR_DEBUG_PRINTF(DBG_ERR,("CMD5 Ready polling Expired \r\n"));
break;
}
AR_DEBUG_PRINTF(DBG_TRACE,("Issuing CMD3 ... \n"));
/* issue CMD3 */
if (!IssueSDCommand(device->handle,3,0,ResponseR6,&response)) {
AR_DEBUG_PRINTF(DBG_ERR,("CMD3 FAILED \n"));
break;
}
rca = SD_SDIO_R6_GET_RCA(response.ResponseBuffer);
AR_DEBUG_PRINTF(DBG_TRACE,("Card RCA : 0x%X \n",rca));
AR_DEBUG_PRINTF(DBG_TRACE,("Issuing CMD7 ... \n"));
/* issue CMD7 to select card */
if (!IssueSDCommand(device->handle, 7,(((A_UINT32)rca) << 16),ResponseR1b,&response)) {
AR_DEBUG_PRINTF(DBG_ERR,("CMD7 FAILED \n"));
break;
}
AR_DEBUG_PRINTF(DBG_TRACE,("Card is now selected! \n"));
/* disable card detect resistor and restore operational bus width */
cmd52Data = CARD_DETECT_DISABLE;
if (device->CardInterface.InterfaceMode == SD_INTERFACE_SD_4BIT) {
/* enable 4-bit mode */
cmd52Data |= 0x2;
}
if (!IssueCMD52(device->handle,
SDIO_BUS_IF_REG,
0,
TRUE,
&cmd52Data)) {
AR_DEBUG_PRINTF(DBG_ERR,("Failed to set bus mode register \r\n"));
break;
}
/* complete interface setup */
if (!SetupSDIOInterface(device)) {
status = A_ERROR;
}
} while (FALSE);
return status;
}
