[PATCH] mmc: mmci: Support for CMD23
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REVIEWED: 1 (0M)
From: Ulf Hansson <hidden>
Date: 2013-05-13 14:33:32
Also in:
linux-mmc
Subsystem:
arm primecell mmci pl180/1 driver, multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Russell King, Ulf Hansson, Linus Torvalds
1 review trailer.
From: Ulf Hansson <redacted> 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. This patch is based upon a patch from Saugata Das. Signed-off-by: Ulf Hansson <redacted> Acked-by: Linus Walleij <redacted> --- drivers/mmc/host/mmci.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index f4f3038..27f29bb 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c@@ -842,7 +842,7 @@ 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);
@@ -855,6 +855,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, unsigned int status) { void __iomem *base = host->base; + bool sbc = (cmd == host->mrq->sbc); host->cmd = NULL;
@@ -869,7 +870,7 @@ 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) { /* Terminate the DMA transfer */ if (dma_inprogress(host)) {
@@ -878,7 +879,9 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, } mmci_stop_data(host); } - mmci_request_end(host, cmd->mrq); + mmci_request_end(host, host->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); }
@@ -1119,7 +1122,10 @@ 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); }
--
1.7.10