diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2016-06-21 07:35:38 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-07-25 10:34:30 +0200 |
| commit | 7e4bf1bc9543a1760cd93f0e23325e7b0365b30a (patch) | |
| tree | 61408c99323fae3b8be11c12a1b348da1ac8c5e9 /drivers/mmc/host/dw_mmc.c | |
| parent | mmc: dw_mmc: remove the quirks flags (diff) | |
| download | linux-7e4bf1bc9543a1760cd93f0e23325e7b0365b30a.tar.xz linux-7e4bf1bc9543a1760cd93f0e23325e7b0365b30a.zip | |
mmc: dw_mmc: add the card write threshold for HS400 mode
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>
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index e7fb0527d0e3..e857beb43144 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -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) |