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mmc_spi: generate R1b response for erase and stop transmission command

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As per the SD physical layer specification version 7.10, erase
command (CMD38) and stop transmission command (CMD12) will generate
R1b response.

R1b = R1 + busy signal

A non-zero value after the R1 response indicates card is ready for
next command.

Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Tested-by: Bin Meng <bin.meng@windriver.com>
This commit is contained in:
Pragnesh Patel 2020-06-29 15:17:29 +05:30 committed by Peng Fan
parent 6f4555af84
commit ed4a11cb7d
1 changed files with 28 additions and 4 deletions
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32
drivers/mmc/mmc_spi.c
View File

@ -59,6 +59,7 @@
#define CMD_TIMEOUT 8
#define READ_TIMEOUT 3000000 /* 1 sec */
#define WRITE_TIMEOUT 3000000 /* 1 sec */
#define R1B_TIMEOUT 3000000 /* 1 sec */
struct mmc_spi_plat {
struct mmc_config cfg;
@ -72,7 +73,7 @@ struct mmc_spi_priv {
static int mmc_spi_sendcmd(struct udevice *dev,
ushort cmdidx, u32 cmdarg, u32 resp_type,
u8 *resp, u32 resp_size,
bool resp_match, u8 resp_match_value)
bool resp_match, u8 resp_match_value, bool r1b)
{
int i, rpos = 0, ret = 0;
u8 cmdo[7], r;
@ -133,6 +134,24 @@ static int mmc_spi_sendcmd(struct udevice *dev,
resp[i] = r;
}
if (r1b == true) {
i = R1B_TIMEOUT;
while (i) {
ret = dm_spi_xfer(dev, 1 * 8, NULL, &r, 0);
if (ret)
return ret;
debug(" resp%d=0x%x", rpos, r);
rpos++;
i--;
if (r)
break;
}
if (!i)
return -ETIMEDOUT;
}
debug("\n");
return 0;
@ -265,7 +284,7 @@ static int dm_mmc_spi_request(struct udevice *dev, struct mmc_cmd *cmd,
int i, multi, ret = 0;
u8 *resp = NULL;
u32 resp_size = 0;
bool resp_match = false;
bool resp_match = false, r1b = false;
u8 resp8 = 0, resp16[2] = { 0 }, resp40[5] = { 0 }, resp_match_value = 0;
dm_spi_claim_bus(dev);
@ -296,12 +315,17 @@ static int dm_mmc_spi_request(struct udevice *dev, struct mmc_cmd *cmd,
break;
case MMC_CMD_SET_BLOCKLEN:
case MMC_CMD_SPI_CRC_ON_OFF:
case MMC_CMD_STOP_TRANSMISSION:
resp = &resp8;
resp_size = sizeof(resp8);
resp_match = true;
resp_match_value = 0x0;
break;
case MMC_CMD_STOP_TRANSMISSION:
case MMC_CMD_ERASE:
resp = &resp8;
resp_size = sizeof(resp8);
r1b = true;
break;
case MMC_CMD_SEND_CSD:
case MMC_CMD_SEND_CID:
case MMC_CMD_READ_SINGLE_BLOCK:
@ -323,7 +347,7 @@ static int dm_mmc_spi_request(struct udevice *dev, struct mmc_cmd *cmd,
};
ret = mmc_spi_sendcmd(dev, cmd->cmdidx, cmd->cmdarg, cmd->resp_type,
resp, resp_size, resp_match, resp_match_value);
resp, resp_size, resp_match, resp_match_value, r1b);
if (ret)
goto done;