From: Saugata Das <saugata.das@xxxxxxxxxx>
Support added for transmission of CMD23 during multi block read or write. In order to activate this feature, MMC_CAP_CMD23 flag needs to be enabled in the capabilities field. Note that CMD23 support is mandatory to support features like reliable write, data tag, context ID, packed command
Signed-off-by: Saugata Das <saugata.das@xxxxxxxxxx>
---
drivers/mmc/host/mmci.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 8eabf99..21f75da 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -726,7 +726,7 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
/* The error clause is handled above, success! */
data->bytes_xfered = data->blksz * data->blocks;
- if (!data->stop) {
+ if (!data->stop || host->mrq->sbc) {
mmci_request_end(host, data->mrq);
} else {
mmci_start_command(host, data->stop, 0);
@@ -739,6 +739,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
unsigned int status)
{
void __iomem *base = host->base;
+ bool sbc = !!(host->mrq->sbc && (host->mrq->sbc == host->cmd));
host->cmd = NULL;
@@ -753,10 +754,12 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
cmd->resp[3] = readl(base + MMCIRESPONSE3);
}
- if (!cmd->data || cmd->error) {
+ if ((!sbc && !cmd->data) || cmd->error) {
if (host->data)
mmci_stop_data(host);
mmci_request_end(host, cmd->mrq);
+ } else if (sbc) {
+ mmci_start_command(host, host->mrq->cmd, 0);
} else if (!(cmd->data->flags & MMC_DATA_READ)) {
mmci_start_data(host, cmd->data);
}
@@ -998,7 +1001,10 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
if (mrq->data && mrq->data->flags & MMC_DATA_READ)
mmci_start_data(host, mrq->data);
- mmci_start_command(host, mrq->cmd, 0);
+ if (mrq->sbc)
+ mmci_start_command(host, mrq->sbc, 0);
+ else
+ mmci_start_command(host, mrq->cmd, 0);
spin_unlock_irqrestore(&host->lock, flags);
}
--
1.7.4.3
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