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Subject[PATCH V2 2/7] mmc: sdhci: made changes for System Address register of SDMA
Date
According to the SD host controller specification version 4.10, when
Host Version 4 is enabled, SDMA uses ADMA System Address register
(05Fh-058h) instead of using SDMA System Address register to
support both 32-bit and 64-bit addressing.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
---
drivers/mmc/host/sdhci.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index cf5695f..f57201f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -805,6 +805,7 @@ static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
{
u8 ctrl;
+ u32 reg;
struct mmc_data *data = cmd->data;

if (sdhci_data_line_cmd(cmd))
@@ -894,8 +895,10 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
SDHCI_ADMA_ADDRESS_HI);
} else {
WARN_ON(sg_cnt != 1);
+ reg = host->v4_mode ? SDHCI_ADMA_ADDRESS :
+ SDHCI_DMA_ADDRESS;
sdhci_writel(host, sdhci_sdma_address(host),
- SDHCI_DMA_ADDRESS);
+ reg);
}
}

@@ -2721,6 +2724,7 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
*/
if (intmask & SDHCI_INT_DMA_END) {
u32 dmastart, dmanow;
+ u32 reg;

dmastart = sdhci_sdma_address(host);
dmanow = dmastart + host->data->bytes_xfered;
@@ -2733,7 +2737,9 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
host->data->bytes_xfered = dmanow - dmastart;
DBG("DMA base 0x%08x, transferred 0x%06x bytes, next 0x%08x\n",
dmastart, host->data->bytes_xfered, dmanow);
- sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
+ reg = host->v4_mode ? SDHCI_ADMA_ADDRESS :
+ SDHCI_DMA_ADDRESS;
+ sdhci_writel(host, dmanow, reg);
}

if (intmask & SDHCI_INT_DATA_END) {
--
2.7.4
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