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mmc_spi: generate response for send status command

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A "send status" command is added with the commit "mmc: checking
status after commands with R1b response". But the status register
returned from send status command of SPI protocol is different from
that of MMC/SD protocol. We do a simple test and generate a response
in stead of full bit-by-bit translation.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
This commit is contained in:
Thomas Chou 2011-04-19 03:48:32 +00:00 committed by Andy Fleming
parent 0ea91423f4
commit ed018b21d6
2 changed files with 6 additions and 0 deletions
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5
drivers/mmc/mmc_spi.c
View file

@ -208,6 +208,11 @@ static int mmc_spi_request(struct mmc *mmc, struct mmc_cmd *cmd,
cmd->response[0] = swab32(cmd->response[0]);
debug("r32 %x\n", cmd->response[0]);
break;
case MMC_CMD_SEND_STATUS:
spi_xfer(spi, 1 * 8, NULL, cmd->response, 0);
cmd->response[0] = (cmd->response[0] & 0xff) ?
MMC_STATUS_ERROR : MMC_STATUS_RDY_FOR_DATA;
break;
}
} else {
debug("%s:data %x %x %x\n", __func__,

1
include/mmc.h
View file

@ -102,6 +102,7 @@
#define MMC_STATUS_MASK (~0x0206BF7F)
#define MMC_STATUS_RDY_FOR_DATA (1 << 8)
#define MMC_STATUS_CURR_STATE (0xf << 9)
#define MMC_STATUS_ERROR (1 << 19)
#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */