After a timeout, reset the controller using SDHCI_RESET_CMD|SDHCI_RESET_DATA
rather than SDHCI_RESET_ALL; the latter turns off clocks and power, removing any possibility of recovering from the error. Also, double the timeout to 2 seconds. Despite what the SD spec says about all transactions completing in 250ms or less, I have a card which sometimes takes more than a second to complete a write.
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@ -725,7 +725,7 @@ sdhci_timeout(void *arg)
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struct sdhci_slot *slot = arg;
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if (slot->curcmd != NULL) {
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sdhci_reset(slot, SDHCI_RESET_ALL);
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sdhci_reset(slot, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
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slot->curcmd->error = MMC_ERR_TIMEOUT;
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sdhci_req_done(slot);
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}
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@ -850,8 +850,8 @@ sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd)
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sdhci_set_transfer_mode(slot, cmd->data);
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/* Start command. */
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WR2(slot, SDHCI_COMMAND_FLAGS, (cmd->opcode << 8) | (flags & 0xff));
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/* Start timeout callout; no command should take more than a second. */
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callout_reset(&slot->timeout_callout, hz, sdhci_timeout, slot);
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/* Start timeout callout. */
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callout_reset(&slot->timeout_callout, 2*hz, sdhci_timeout, slot);
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}
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static void
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