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Add a new SDHCI quirk, SDHCI_QUIRK_BROKEN_AUTO_STOP, to workaround

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controllers that do not support or have broken ACMD12 implementations.

Reviewed by:	jmcneill
Obtained from:	NetBSD
MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC (Netgate)
Differential Revision:	https://reviews.freebsd.org/D10602
This commit is contained in:
Luiz Otavio O Souza 2017-05-09 19:01:57 +00:00
parent da880f61ca
commit 915780d764
2 changed files with 10 additions and 6 deletions
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14
sys/dev/sdhci/sdhci.c
View File

@ -1060,7 +1060,7 @@ sdhci_set_transfer_mode(struct sdhci_slot *slot, struct mmc_data *data)
mode |= SDHCI_TRNS_MULTI;
if (data->flags & MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
if (slot->req->stop)
if (slot->req->stop && !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))
mode |= SDHCI_TRNS_ACMD12;
if (slot->flags & SDHCI_USE_DMA)
mode |= SDHCI_TRNS_DMA;
@ -1305,7 +1305,8 @@ sdhci_finish_data(struct sdhci_slot *slot)
slot->intmask |= SDHCI_INT_RESPONSE);
}
/* Unload rest of data from DMA buffer. */
if (!slot->data_done && (slot->flags & SDHCI_USE_DMA)) {
if (!slot->data_done && (slot->flags & SDHCI_USE_DMA) &&
slot->curcmd->data != NULL) {
if (data->flags & MMC_DATA_READ) {
left = data->len - slot->offset;
bus_dmamap_sync(slot->dmatag, slot->dmamap,
@ -1343,17 +1344,18 @@ sdhci_start(struct sdhci_slot *slot)
sdhci_start_command(slot, req->cmd);
return;
}
/* We don't need this until using Auto-CMD12 feature
if (!(slot->flags & STOP_STARTED) && req->stop) {
if ((slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP) &&
!(slot->flags & STOP_STARTED) && req->stop) {
slot->flags |= STOP_STARTED;
sdhci_start_command(slot, req->stop);
return;
}
*/
if (sdhci_debug > 1)
slot_printf(slot, "result: %d\n", req->cmd->error);
if (!req->cmd->error &&
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) {
((slot->curcmd == req->stop &&
(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP)) ||
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
}

2
sys/dev/sdhci/sdhci.h
View File

@ -87,6 +87,8 @@
#define SDHCI_QUIRK_CAPS_BIT63_FOR_MMC_HS400 (1 << 26)
/* Controller support for SDHCI_CTRL2_PRESET_VALUE is broken. */
#define SDHCI_QUIRK_PRESET_VALUE_BROKEN (1 << 27)
/* Controller does not support or the support for ACMD12 is broken. */
#define SDHCI_QUIRK_BROKEN_AUTO_STOP (1 << 28)
/*
* Controller registers