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mmc: dw_mmc: add the card write threshold for HS400 mode

소스 검색 
Since v2.80a, dwmmc controller introduced the card write threshold for
HS400 mode. So CardThrCtl can be supported during write operation, not
only read operation.
(Note: Only use the write threshold when mode is HS400.)

To use more compatible, removed "_rd_" from function name.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jaehoon Chung
2016-06-21 14:35:38 +09:00
committed by Ulf Hansson
부모 16a34574c6
커밋 7e4bf1bc95
2개의 변경된 파일과 28개의 추가작업 그리고 12개의 파일을 삭제
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34
drivers/mmc/host/dw_mmc.c
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@@ -899,23 +899,35 @@ done:
mci_writel(host, FIFOTH, fifoth_val);
}
static void dw_mci_ctrl_rd_thld(struct dw_mci *host, struct mmc_data *data)
static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data)
{
unsigned int blksz = data->blksz;
u32 blksz_depth, fifo_depth;
u16 thld_size;
WARN_ON(!(data->flags & MMC_DATA_READ));
u8 enable;
/*
* CDTHRCTL doesn't exist prior to 240A (in fact that register offset is
* in the FIFO region, so we really shouldn't access it).
*/
if (host->verid < DW_MMC_240A)
if (host->verid < DW_MMC_240A ||
(host->verid < DW_MMC_280A && data->flags & MMC_DATA_WRITE))
return;
/*
* Card write Threshold is introduced since 2.80a
* It's used when HS400 mode is enabled.
*/
if (data->flags & MMC_DATA_WRITE &&
!(host->timing != MMC_TIMING_MMC_HS400))
return;
if (data->flags & MMC_DATA_WRITE)
enable = SDMMC_CARD_WR_THR_EN;
else
enable = SDMMC_CARD_RD_THR_EN;
if (host->timing != MMC_TIMING_MMC_HS200 &&
host->timing != MMC_TIMING_MMC_HS400 &&
host->timing != MMC_TIMING_UHS_SDR104)
goto disable;
@@ -931,11 +943,11 @@ static void dw_mci_ctrl_rd_thld(struct dw_mci *host, struct mmc_data *data)
* Currently just choose blksz.
*/
thld_size = blksz;
mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(thld_size, 1));
mci_writel(host, CDTHRCTL, SDMMC_SET_THLD(thld_size, enable));
return;
disable:
mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(0, 0));
mci_writel(host, CDTHRCTL, 0);
}
static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data)
@@ -1006,12 +1018,12 @@ static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data)
host->sg = NULL;
host->data = data;
if (data->flags & MMC_DATA_READ) {
if (data->flags & MMC_DATA_READ)
host->dir_status = DW_MCI_RECV_STATUS;
dw_mci_ctrl_rd_thld(host, data);
} else {
else
host->dir_status = DW_MCI_SEND_STATUS;
}
dw_mci_ctrl_thld(host, data);
if (dw_mci_submit_data_dma(host, data)) {
if (host->data->flags & MMC_DATA_READ)