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>
This commit is contained in:
Jaehoon Chung 2016-06-21 14:35:38 +09:00 committed by Ulf Hansson
parent 16a34574c6
commit 7e4bf1bc95
2 changed files with 28 additions and 12 deletions

View File

@ -899,23 +899,35 @@ done:
mci_writel(host, FIFOTH, fifoth_val); 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; unsigned int blksz = data->blksz;
u32 blksz_depth, fifo_depth; u32 blksz_depth, fifo_depth;
u16 thld_size; u16 thld_size;
u8 enable;
WARN_ON(!(data->flags & MMC_DATA_READ));
/* /*
* CDTHRCTL doesn't exist prior to 240A (in fact that register offset is * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is
* in the FIFO region, so we really shouldn't access it). * 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; 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 && if (host->timing != MMC_TIMING_MMC_HS200 &&
host->timing != MMC_TIMING_MMC_HS400 &&
host->timing != MMC_TIMING_UHS_SDR104) host->timing != MMC_TIMING_UHS_SDR104)
goto disable; 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. * Currently just choose blksz.
*/ */
thld_size = 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; return;
disable: 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) 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->sg = NULL;
host->data = data; host->data = data;
if (data->flags & MMC_DATA_READ) { if (data->flags & MMC_DATA_READ)
host->dir_status = DW_MCI_RECV_STATUS; host->dir_status = DW_MCI_RECV_STATUS;
dw_mci_ctrl_rd_thld(host, data); else
} else {
host->dir_status = DW_MCI_SEND_STATUS; host->dir_status = DW_MCI_SEND_STATUS;
}
dw_mci_ctrl_thld(host, data);
if (dw_mci_submit_data_dma(host, data)) { if (dw_mci_submit_data_dma(host, data)) {
if (host->data->flags & MMC_DATA_READ) if (host->data->flags & MMC_DATA_READ)

View File

@ -15,6 +15,7 @@
#define _DW_MMC_H_ #define _DW_MMC_H_
#define DW_MMC_240A 0x240a #define DW_MMC_240A 0x240a
#define DW_MMC_280A 0x280a
#define SDMMC_CTRL 0x000 #define SDMMC_CTRL 0x000
#define SDMMC_PWREN 0x004 #define SDMMC_PWREN 0x004
@ -175,7 +176,10 @@
/* Version ID register define */ /* Version ID register define */
#define SDMMC_GET_VERID(x) ((x) & 0xFFFF) #define SDMMC_GET_VERID(x) ((x) & 0xFFFF)
/* Card read threshold */ /* Card read threshold */
#define SDMMC_SET_RD_THLD(v, x) (((v) & 0xFFF) << 16 | (x)) #define SDMMC_SET_THLD(v, x) (((v) & 0xFFF) << 16 | (x))
#define SDMMC_CARD_WR_THR_EN BIT(2)
#define SDMMC_CARD_RD_THR_EN BIT(0)
/* UHS-1 register defines */
#define SDMMC_UHS_18V BIT(0) #define SDMMC_UHS_18V BIT(0)
/* All ctrl reset bits */ /* All ctrl reset bits */
#define SDMMC_CTRL_ALL_RESET_FLAGS \ #define SDMMC_CTRL_ALL_RESET_FLAGS \