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mmc: Handle switch error status bit in MMC card status
MMC switch command for unsupported feature (e.g. bus width) sets a switch error bit in card status. This bit should be checked, and, if it's set, no access with new controller settings should be performed. Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
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@ -150,6 +150,8 @@ int mmc_send_status(struct mmc *mmc, int timeout)
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#endif
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return TIMEOUT;
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}
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if (cmd.response[0] & MMC_STATUS_SWITCH_ERROR)
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return SWITCH_ERR;
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return 0;
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}
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@ -501,7 +503,7 @@ static int mmc_change_freq(struct mmc *mmc)
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err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
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if (err)
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return err;
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return err == SWITCH_ERR ? 0 : err;
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/* Now check to see that it worked */
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err = mmc_send_ext_csd(mmc, ext_csd);
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@ -54,6 +54,7 @@
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#define COMM_ERR -18 /* Communications Error */
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#define TIMEOUT -19
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#define IN_PROGRESS -20 /* operation is in progress */
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#define SWITCH_ERR -21 /* Card reports failure to switch mode */
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#define MMC_CMD_GO_IDLE_STATE 0
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#define MMC_CMD_SEND_OP_COND 1
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@ -109,6 +110,7 @@
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#define SECURE_ERASE 0x80000000
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#define MMC_STATUS_MASK (~0x0206BF7F)
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#define MMC_STATUS_SWITCH_ERROR (1 << 7)
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#define MMC_STATUS_RDY_FOR_DATA (1 << 8)
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#define MMC_STATUS_CURR_STATE (0xf << 9)
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#define MMC_STATUS_ERROR (1 << 19)
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