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 --- drivers/mmc/mmc_spi.c | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c index 96a41076dc..50fcd32674 100644 --- a/drivers/mmc/mmc_spi.c +++ b/drivers/mmc/mmc_spi.c @@ -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;