static int bfin_sdh_request(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
u32 status;
int ret = 0;
ret = sdh_send_cmd(mmc, cmd);
if (ret) {
printf("sending CMD%d failed\n", cmd->cmdidx);
return ret;
}
if (data) {
ret = sdh_setup_data(mmc, data);
do {
udelay(1);
status = bfin_read_SDH_STATUS();
} while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)));
if (status & DAT_TIME_OUT) {
bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT);
ret |= TIMEOUT;
} else if (status & (DAT_CRC_FAIL | RX_OVERRUN)) {
bfin_write_SDH_STATUS_CLR(DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT);
ret |= COMM_ERR;
} else
bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
if (ret) {
printf("tranfering data failed\n");
return ret;
}
}
return 0;
}
static int
sdh_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd)
{
unsigned int sdh_cmd;
unsigned int status;
int cmd = mmc_cmd->cmdidx;
int flags = mmc_cmd->resp_type;
int arg = mmc_cmd->cmdarg;
int ret = 0;
sdh_cmd = 0;
sdh_cmd |= cmd;
if (flags & MMC_RSP_PRESENT)
sdh_cmd |= CMD_RSP;
if (flags & MMC_RSP_136)
sdh_cmd |= CMD_L_RSP;
bfin_write_SDH_ARGUMENT(arg);
bfin_write_SDH_COMMAND(sdh_cmd | CMD_E);
/* wait for a while */
do {
udelay(1);
status = bfin_read_SDH_STATUS();
} while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT |
CMD_CRC_FAIL)));
if (flags & MMC_RSP_PRESENT) {
mmc_cmd->response[0] = bfin_read_SDH_RESPONSE0();
if (flags & MMC_RSP_136) {
mmc_cmd->response[1] = bfin_read_SDH_RESPONSE1();
mmc_cmd->response[2] = bfin_read_SDH_RESPONSE2();
mmc_cmd->response[3] = bfin_read_SDH_RESPONSE3();
}
}
if (status & CMD_TIME_OUT)
ret |= TIMEOUT;
else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC)
ret |= COMM_ERR;
bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT |
CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT);
return ret;
}
static int
mmc_cmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags)
{
unsigned int sdh_cmd;
unsigned int status;
int ret = 0;
sdh_cmd = 0;
unsigned long *response = resp;
sdh_cmd |= cmd;
if (flags & MMC_RSP_PRESENT)
sdh_cmd |= CMD_RSP;
if (flags & MMC_RSP_136)
sdh_cmd |= CMD_L_RSP;
bfin_write_SDH_ARGUMENT(arg);
bfin_write_SDH_COMMAND(sdh_cmd | CMD_E);
/* wait for a while */
do {
udelay(1);
status = bfin_read_SDH_STATUS();
} while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT |
CMD_CRC_FAIL)));
if (flags & MMC_RSP_PRESENT) {
response[0] = bfin_read_SDH_RESPONSE0();
if (flags & MMC_RSP_136) {
response[1] = bfin_read_SDH_RESPONSE1();
response[2] = bfin_read_SDH_RESPONSE2();
response[3] = bfin_read_SDH_RESPONSE3();
}
}
if (status & CMD_TIME_OUT) {
printf("CMD%d timeout\n", (int)cmd);
ret |= -ETIMEDOUT;
} else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC) {
printf("CMD%d CRC failure\n", (int)cmd);
ret |= -EILSEQ;
}
bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT |
CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT);
return ret;
}
static unsigned long
mmc_bwrite(int dev, unsigned long start, lbaint_t blkcnt, const void *buffer)
{
int ret, i = 0;
unsigned long resp[4];
unsigned long card_status;
const __u8 *buf = buffer;
__u32 status;
__u16 data_ctl = 0;
__u16 dma_cfg = 0;
if (blkcnt == 0)
return 0;
debug("mmc_bwrite: dev %d, start %lx, blkcnt %lx\n",
dev, start, blkcnt);
/* Force to use 512-byte block,because a lot of code depends on this */
data_ctl |= 9 << 4;
data_ctl &= ~DTX_DIR;
bfin_write_SDH_DATA_CTL(data_ctl);
dma_cfg |= WDSIZE_32 | RESTART | DMAEN;
/* FIXME later */
bfin_write_SDH_DATA_TIMER(0xFFFFFFFF);
for (i = 0; i < blkcnt; ++i, ++start) {
bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz);
bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4);
bfin_write_DMA_X_MODIFY(4);
bfin_write_DMA_CONFIG(dma_cfg);
bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz);
/* Put the device into Transfer state */
ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1);
if (ret) {
printf("MMC_CMD_SELECT_CARD failed\n");
goto out;
}
/* Set block length */
ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1);
if (ret) {
printf("MMC_CMD_SET_BLOCKLEN failed\n");
goto out;
}
ret = mmc_cmd(MMC_CMD_WRITE_SINGLE_BLOCK,
start * mmc_blkdev.blksz, resp,
MMC_RSP_R1);
if (ret) {
printf("MMC_CMD_WRITE_SINGLE_BLOCK failed\n");
goto out;
}
bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
do {
udelay(1);
status = bfin_read_SDH_STATUS();
} while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)));
if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)) {
bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT |
DAT_CRC_FAIL_STAT | TX_UNDERRUN_STAT);
goto write_error;
} else {
bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0);
}
}
out:
return i;
write_error:
mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1);
printf("mmc: bwrite failed, status = %08x, card status = %08lx\n",
status, card_status);
goto out;
}
static int
sdh_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd)
{
unsigned int status, timeout;
int cmd = mmc_cmd->cmdidx;
int flags = mmc_cmd->resp_type;
int arg = mmc_cmd->cmdarg;
int ret;
u16 sdh_cmd;
sdh_cmd = cmd | CMD_E;
if (flags & MMC_RSP_PRESENT)
sdh_cmd |= CMD_RSP;
if (flags & MMC_RSP_136)
sdh_cmd |= CMD_L_RSP;
#ifdef RSI_BLKSZ
sdh_cmd |= CMD_DATA0_BUSY;
#endif
bfin_write_SDH_ARGUMENT(arg);
bfin_write_SDH_COMMAND(sdh_cmd);
/* wait for a while */
timeout = 0;
do {
if (++timeout > 1000000) {
status = CMD_TIME_OUT;
break;
}
udelay(1);
status = bfin_read_SDH_STATUS();
} while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT |
CMD_CRC_FAIL)));
if (flags & MMC_RSP_PRESENT) {
mmc_cmd->response[0] = bfin_read_SDH_RESPONSE0();
if (flags & MMC_RSP_136) {
mmc_cmd->response[1] = bfin_read_SDH_RESPONSE1();
mmc_cmd->response[2] = bfin_read_SDH_RESPONSE2();
mmc_cmd->response[3] = bfin_read_SDH_RESPONSE3();
}
}
if (status & CMD_TIME_OUT)
ret = TIMEOUT;
else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC)
ret = COMM_ERR;
else
ret = 0;
bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT |
CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT);
#ifdef RSI_BLKSZ
/* wait till card ready */
while (!(bfin_read_RSI_ESTAT() & SD_CARD_READY))
continue;
bfin_write_RSI_ESTAT(SD_CARD_READY);
#endif
return ret;
}
